Dundee United breathed new life into their bid to stave off relegation with a thumping win over Kilmarnock.
Blair Spittal was outstanding for the hosts, who are now 11 points adrift at the bottom of the Premiership.
The teenage midfielder drilled in the opening goal and his curling delivery went straight in to make it 3-0.
Spittal set up a Mark Durnan header and a John Rankin volley before half-time, with Sean Dillon making it five before a late Josh Magennis reply.
Prior to kick-off, United manager Mixu Paatelainen admitted it would be very difficult to beat the drop if they lost to the team closest to them in the table.
And his players responded with a performance full of energy to register just their third league victory of the season.
Kilmarnock were looking for a third successive win and were unbeaten in the last three meetings between the sides but the Ayrshire side were simply blown away by United's hunger and tempo, which was not disrupted by first-half injuries to Coll Donaldson and Guy Demel.
Spittal was full of invention and clever promptings, while Paul Paton's first start of the season added steel and drive to the heart of the United midfield and Simon Murray chased everything up front.
Murray laid the ball off for Spittal to steer a low, angled strike into the bottom corner after eight minutes.
The goal gave the large home crowd a massive lift and they had more to cheer when Durnan met a Spittal corner kick at the near post, with Killie keeper Jamie MacDonald only pushing the ball into the roof of the net.
The former Queen of the South defender had replaced Donaldson in time to net his first goal for the club.
Kilmarnock were punished further as they stood off Spittal and his cross from the right was missed by everyone and somehow bounced into the far corner of the net.
Soon after, another delivery from Spittal was deflected to the back post where Rankin was waiting to lash in a well-timed volley.
United's intensity dipped after the interval but the fifth goal was perhaps the pick of the bunch as a slick move was finished off by Dillon, who evaded a number of challenges before clipping the ball beyond MacDonald.
It was all down to the application and determination of the defender and all 10 outfield United players celebrated riotously with their skipper.
Magennis was thwarted by a good save from Eiji Kawashima but got the better of the Japanese international from the resultant corner, glancing a header home.
The victory and its comprehensive manner will give United heart for the remaining 15 matches of the campaign, as will the inept display from the team immediately in their sights.
Full Time Match ends, Dundee United 5, Kilmarnock 1.
90:00 +0:57 Full timeFull Time Second Half ends, Dundee United 5, Kilmarnock 1.
88:48Simon Murray (Dundee United) wins a free kick in the defensive half.
88:48Foul by David Syme (Kilmarnock).
85:02Corner, Dundee United. Conceded by Kevin McHattie.
84:39Corner, Dundee United. Conceded by Conrad Balatoni.
83:27Paul Paton (Dundee United) wins a free kick on the right wing.
83:27Foul by Tope Obadeyi (Kilmarnock).
82:18Corner, Dundee United. Conceded by Stuart Findlay.
81:07 Goal scoredGoal! Goal! Dundee United 5, Kilmarnock 1. Josh Magennis (Kilmarnock) header from the left side of the six yard box to the high centre of the goal. Assisted by Craig Slater.
80:59Corner, Kilmarnock. Conceded by Sean Dillon.
80:43Corner, Kilmarnock. Conceded by Eiji Kawashima.
80:28Attempt saved. Josh Magennis (Kilmarnock) header from the centre of the box is saved in the top right corner.
80:09Corner, Kilmarnock. Conceded by Gavin Gunning.
79:34Corner, Kilmarnock. Conceded by Gavin Gunning.
78:54 SubstitutionSubstitution Substitution, Dundee United. Riku Riski replaces Ryan Dow.
77:04 Goal scoredGoal! Goal! Dundee United 5, Kilmarnock 0. Sean Dillon (Dundee United) right footed shot from very close range to the centre of the goal. Assisted by Billy McKay.
75:34Corner, Dundee United. Conceded by Craig Slater.
74:32Attempt saved. John Souttar (Dundee United) right footed shot from outside the box is saved in the bottom left corner.
72:48Corner, Dundee United. Conceded by Kevin McHattie.
Corner, Dundee United. Conceded by Conrad Balatoni.
67:53John Souttar (Dundee United) wins a free kick in the defensive half.
67:53Foul by Tope Obadeyi (Kilmarnock).
63:21Attempt saved. Craig Slater (Kilmarnock) right footed shot from outside the box is saved in the top right corner.
62:51Corner, Kilmarnock. Conceded by Gavin Gunning.
62:09Foul by Ryan Dow (Dundee United).
62:09Kevin McHattie (Kilmarnock) wins a free kick in the defensive half.
60:46Corner, Dundee United. Conceded by David Syme.
60:01 SubstitutionSubstitution Substitution, Kilmarnock. Tope Obadeyi replaces Kallum Higginbotham.
59:01Hand ball by Adam Frizzell (Kilmarnock).
56:08Attempt saved. Greg Kiltie (Kilmarnock) right footed shot from outside the box is saved in the bottom right corner.
55:26Attempt missed. Simon Murray (Dundee United) header from the right side of the six yard box is just a bit too high.
50:48Foul by Paul Paton (Dundee United).
50:48Adam Frizzell (Kilmarnock) wins a free kick in the defensive half.
49:28Attempt missed. Jamie Hamill (Kilmarnock) right footed shot from outside the box is high and wide to the left.
47:56Attempt saved. Josh Magennis (Kilmarnock) header from the centre of the box is saved in the top centre of the goal.
47:21Foul by Paul Paton (Dundee United).
47:21Kevin McHattie (Kilmarnock) wins a free kick on the right wing.
46:00Corner, Kilmarnock. Conceded by Ryan Dow.
45:00Second Half begins Dundee United 4, Kilmarnock 0.
45:00 SubstitutionSubstitution Substitution, Kilmarnock. Kevin McHattie replaces Lee Ashcroft.
45:00 +4:59 Half timeHalf Time First Half ends, Dundee United 4, Kilmarnock 0.
45:00 +4:21Paul Paton (Dundee United) wins a free kick in the defensive half.
45:00 +4:21Foul by Craig Slater (Kilmarnock).
45:00 +2:51Attempt missed. Gavin Gunning (Dundee United) header from the centre of the box is close, but misses to the right.
45:00 +2:19 BookingBooking David Syme (Kilmarnock) is shown the yellow card for a bad foul.
45:00 +2:14John Rankin (Dundee United) wins a free kick in the defensive half.
45:00 +2:14Foul by David Syme (Kilmarnock).
45:00 +1:25Attempt saved. Jamie Hamill (Kilmarnock) right footed shot from the centre of the box is saved in the centre of the goal.
45:00 +0:38Foul by Mark Durnan (Dundee United).
45:00 +0:38Josh Magennis (Kilmarnock) wins a free kick in the defensive half.
45:00 +0:10Attempt saved. Ryan Dow (Dundee United) header from the centre of the box is saved in the top centre of the goal.
43:45 Goal scoredGoal! Goal! Dundee United 4, Kilmarnock 0. John Rankin (Dundee United) right footed shot from the centre of the box to the top right corner. Assisted by Blair Spittal.
41:26John Rankin (Dundee United) wins a free kick on the right wing.
41:26Foul by Kallum Higginbotham (Kilmarnock).
39:43Attempt missed. Paul Paton (Dundee United) right footed shot from outside the box is close, but misses to the left.
38:10 Goal scoredGoal! Goal! Dundee United 3, Kilmarnock 0. Blair Spittal (Dundee United) left footed shot from long range on the right to the bottom left corner.
36:03Corner, Dundee United. Conceded by Jamie MacDonald.
35:39Attempt saved. Simon Murray (Dundee United) right footed shot from a difficult angle on the right is saved in the bottom right corner.
33:33 SubstitutionSubstitution Substitution, Dundee United. John Souttar replaces Guy Demel because of an injury.
31:23 Goal scoredGoal! Goal! Dundee United 2, Kilmarnock 0. Mark Durnan (Dundee United) header from the centre of the box to the top right corner. Assisted by Blair Spittal.
31:05Corner, Dundee United. Conceded by Lee Ashcroft.
30:31Ryan Dow (Dundee United) wins a free kick on the right wing.
30:31Foul by Adam Frizzell (Kilmarnock).
29:52John Rankin (Dundee United) wins a free kick on the right wing.
29:52Foul by Adam Frizzell (Kilmarnock).
28:02Foul by Blair Spittal (Dundee United).
28:02Adam Frizzell (Kilmarnock) wins a free kick on the right wing.
27:27Corner, Dundee United. Conceded by Josh Magennis.
27:04Corner, Dundee United. Conceded by Kallum Higginbotham.
26:33Corner, Dundee United. Conceded by Stuart Findlay.
25:54Attempt missed. Billy McKay (Dundee United) right footed shot from the centre of the box is close, but misses to the right.
25:21Corner, Dundee United. Conceded by Jamie MacDonald.
24:40John Rankin (Dundee United) wins a free kick on the left wing.
24:40Foul by David Syme (Kilmarnock).
23:45Attempt missed. Simon Murray (Dundee United) right footed shot from outside the box is close, but misses to the right.
19:03Foul by Sean Dillon (Dundee United).
19:03Greg Kiltie (Kilmarnock) wins a free kick in the attacking half.
17:18Corner, Dundee United. Conceded by Adam Frizzell.
15:15Foul by Simon Murray (Dundee United).
15:15Stuart Findlay (Kilmarnock) wins a free kick in the attacking half.
13:43 SubstitutionSubstitution Substitution, Dundee United. Mark Durnan replaces Coll Donaldson because of an injury.
12:57Delay in match Coll Donaldson (Dundee United) because of an injury.
12:14 SubstitutionSubstitution Substitution, Kilmarnock. Adam Frizzell replaces Steven Smith because of an injury.
10:14Delay in match Coll Donaldson (Dundee United) because of an injury.
9:42Sean Dillon (Dundee United) wins a free kick in the attacking half.
9:42Foul by Greg Kiltie (Kilmarnock).
7:08 Goal scoredGoal! Goal! Dundee United 1, Kilmarnock 0. Blair Spittal (Dundee United) right footed shot from the right side of the box to the bottom left corner. Assisted by Simon Murray.
5:48Corner, Dundee United. Conceded by Stuart Findlay.
4:09Attempt saved. Josh Magennis (Kilmarnock) right footed shot from the centre of the box is saved in the centre of the goal.
3:43Foul by Kallum Higginbotham (Kilmarnock).
3:43Coll Donaldson (Dundee United) wins a free kick on the left wing.
0:00First Half begins.
0:00Lineups are announced and players are warming up.
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