Brett Ormerod celebrates scoring his second goal for Blackpool
Blackpool reignited their play-off hopes by thrashing promotion rivals Swansea City at a wet Bloomfield Road.
Brett Ormerod opened the scoring on 13 minutes sliding home after Dorus De Vries parried Billy Clarke's shot.
Ian Evatt doubled the lead on the stroke of half-time, driving through a crowd of players.
Ben Burgess added the third, Ormerod grabbed his second and Gary Taylor-Fletcher made it 5-0 before Cedric van der Gun pulled one back.
It was Swansea's heaviest defeat of the season and they have not been beaten by a four-goal margin since the 4-0 defeat at Reading in September 2008.
But it could have a huge impact on their own play-off hopes at such a crucial stage of the season as their poor run of form stretched to only one win in six.
The fifth-place Swans - who boasted the best defence in the Championship before the game - are still in a relatively comfortable position in the top six though, but Blackpool have closed the gap on them to seven points.
Ian Holloway's side are now four points off the play-off places after climbing up to seventh in the Championship in what was a must-win game for them.
They came charging out of the blocks and De Vries was called into action early on when Charlie Adam found Taylor-Fletcher who forced a save from the Dutchman.
But Blackpool did not have to wait long for their opener which came on 13 minutes.
De Vries parried Clarke's shot from the left but it fell into the path of Ormerod - recalled to the starting line-up along with Taylor-Fletcher and Burgess - who slid the ball home.
The lead was deserved and they could have gone further ahead first through Adam who shot wide, and then Clarke who fired straight at De Vries.
But Blackpool struggled to keep their high tempo going and allowed Swansea back into the game to start to dictate proceedings.
Swansea City's players trudge off after the final whistle
Evatt had to react quickly and time his tackle well to deny Nathan Dyer who raced into the box following a sweet cross-field pass by Ashley Williams.
Then keeper Matthew Gilks had to rush out to smother at David Cotterill's feet after good work with Shefki Kuqi.
But Swansea were punished for not making the most of their possession on the stroke of half-time when Blackpool doubled their lead.
Clarke produced some good work down the right and found Seamus Coleman who pulled the ball back to find Evatt who drilled low through a crowd of players and into the net.
Swansea had not come from behind to win a game in the Championship this season and any chance of that happening at Bloomfield Road were ended five minutes after the break.
The excellent Clarke sent a curling effort from an acute angle against the post and Burgess was on hand to tap home.
Swansea almost instantly gave themselves a glimmer of hope with Gilks tipping over a Van der Gun header.
But Ormerod put the game further beyond Swansea's reach in the 68th-minute curling into the top corner from the edge of the box to clinch his 10th goal of the season.
And Taylor-Fletcher wrapped up an emphatic night eight minutes from time tapping the ball home Coleman's squared ball from six yards to make it 5-0.
Van der Gun did grab a late consolation after making the most of substitute Stephen Husband's mistake, but the damage was already done.
The last time the Swans conceded more than four goals in a game was against Blackpool in May 2007, when they lost 6-3 at the Liberty Stadium.
It was also the last time the Seasiders scored more than five goals in a game.
Blackpool manager Ian Holloway: "We really hurt them in front of goal. This was an excellent team performance which I am delighted about.
"I always said 52 points would give us safety in the Championship and now we are on 54 and still there or thereabouts with a possible play-off place.
"That is some achievement for this club and its players, who were written off by the bookies as relegation candidates at the start of the season."
Sousa wants Swansea reaction
Swansea manager Paulo Sousa:
"Of course I am disappointed but Blackpool have more experience in playing in these sort of conditions.
"We have just got to get ourselves back together again for Saturday. The players know they have to focus themselves.
"Blackpool scored some good goals and that is why I need to strengthen my defence."
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