Hull City suffered back-to-back defeats for the first time this season after a last-gasp loss at in-form Blackpool.
Reece Burke’s 89th-minute header looked to have rescued a point after goals either side of half-time from Jerry Yates and Keshi Anderson had overturned birthday boy Mallik Wilks’ opener.
But CJ Hamilton struck a dramatic winner in the third minute of added time to leave the shell-shocked Tigers winless in three league games.
Grant McCann freshened up his side for the trip to Bloomfield Road, making four changes from the surprise home defeat to struggling Shrewsbury.
In came Lewie Coyle, Regan Slater, James Scott and Tom Eaves, with Josh Emmanuel, Hakeeb Adelakun and Josh Magennis dropping to the bench and George Honeyman missing out completely.
Hull City had responded to every previous defeat with a win and started in determined mood, Jacob Greaves nodding wide from Slater’s corner inside two minutes.
A frenetic start saw Greaves back on defensive duty to make a fine recovery challenge to thwart Hamilton before Anderson’s deflected looping shot was fumbled behind by Matt Ingram.
Luke Garbutt came within a whisker of giving the Seasiders a 14th-minute lead, collecting Sullay Kaikai’s pass and drilling a left-footed strike inches wide of the far post.
The match continued at a fast pace, Smallwood’s lofted pass picking out the untracked run of Scott but his touch let him down, with the forward possibly expecting an offside flag that never came.
There was an almighty scare for the visitors as Eaves inadvertently diverted the ball towards his own goal but, to his relief, Ingram clawed the ball off the line.
Scott set his sights twice from range, seeing one effort acrobatically held by Pool keeper Chris Maxwell and another drift wide after a positive surge.
The sides had been evenly matched but the deadlock was broken eight minutes before the break thanks to a goal from Wilks on his 22nd birthday.
Callum Elder sent an inviting low cross into the middle and Wilks took one touch to control before scooping a clever finish over Maxwell for his ninth goal of the season.
Neil Critchley’s side had lost once in 11 games and refused to let their heads drop, Hamilton being denied by the body of Ingram after latching onto Kaikai’s through ball.
The Tigers failed to heed the warning as Blackpool pulled level on the stroke of half-time, Garbutt fizzing in a low cross which Yates smashed home from close range.
Hull City flew out of the traps for the second half but Maxwell produced a spectacular one-handed stop to palm away Scott’s first-time curling effort that was heading for the top corner.
Kenny Dougall’s towering header from Garbutt’s corner landed on the roof of the net, while Wilks curled a free-kick over.
Greg Docherty’s deflected effort was held by Maxwell but the visitors were hit by a sucker punch as Pool immediately turned defence into attack.
Maxwell’s long kick released Anderson in behind and the striker powered a low finish across Ingram into the far corner to put Pool in front with 67 on the clock.
Only a lick of paint prevented the Tangerines from making it 3-1, Josh Magennis heading against his own post from Garbutt’s free-kick, with the substitute blocking a follow-up effort on the line.
Facing successive league defeats, the Tigers poured forward in search of a leveller.
And Hull City found one with a minute of normal time remaining, Burke meeting Elder’s corner with a towering header which Maxwell got a hand to but couldn’t keep out.
The Tigers’ hard work was almost undone immediately when Hamilton was left free in the area but Ingram stood strong to block at his near post.
But that proved only a reprieve as Blackpool struck deep in added time, Hamilton sweeping a left-footed shot into the bottom corner from 15 yards after some neat one-touch play.
Blackpool: Chris Maxwell ©, Ethan Robson (Matty Virtue 79’), Keshi Anderson, Jerry Yates (Ben Woodburn 87’), Sullay Kaikai (Gary Madine 60’), Kenny Dougall, Ollie Turton, Marvin Ekpiteta, CJ Hamilton, Daniel Gretarsson, Luke Garbutt.
Subs not used: Alex Fojticek, Jordan Gabriel, James Husband, Dan Kemp.
Hull City: Matt Ingram; Lewie Coyle, Reece Burke, Jacob Greaves, Callum Elder; Richie Smallwood ©, Greg Docherty, Regan Slater (Hakeeb Adelakun 75’); Mallik Wilks, Tom Eaves (Josh Magennis 65’), James Scott (Keane Lewis-Potter 65’).
Subs not used: George Long, Dan Batty, Josh Emmanuel, Sean McLoughlin.