Darren Huckerby inspired Coventry to a stunning FA Cup victory at Liverpool - one week after his wonder winner accounted for Premiership leaders Manchester United.
Huckerby's second memorable individual strike of the week pulled the Sky Blues level after Jamie Redknapp had put Roy Evans' men ahead.
And the pacy striker had a hand in both City's other goals as Liverpool's fine run of four wins on the trot came crashing to an end.
All Liverpool's early-season worries about their defence returned in a nightmare 90 minutes.
In attack Robbie Fowler was virtually non-existent, Steve McManaman found not an inch of space to work in, and the Merseysiders' Wembley dreams were destroyed in the swirling gales.
Liverpool's bad day started before the kick-off when Michael Owen was ruled out with 'flu, forcing manager Evans to change a winning team.
Karlheinz Riedle came into the attack but despite Redknapp's opening goal, Coventry appeared hell-bent on Premiership defeat earlier this season at the same venue.
Their intentions were clear after just 35 seconds when Paul Telfer was booked for a foul on Steve Harkness.
But Riedle got away down the right to flash a shot across the face of the goal, and was then involved in the first goal. He was fouled 20 yards out by Paul Williams and Redknapp blasted home hard and low from the resulting free-kick.
It was the start Liverpool had hoped for, and it could have been two after 15 minutes when Redknapp chipped a 20-yard shot onto the bar.
But the alarm bells were already ringing in the Liverpool defence. Goalkeeper David James had one of those days he would prefer to forget and his defence was being put under increasing pressure by Huckerby.
James hit Huckerby with one clearance and then saw Dion Dublin charge another one down.
Huckerby also bounced one shot off James' right-hand post and then created a clear chance for Noel Whelan with a cross, despite being policed by three defenders.
Then Huckerby got away again on the left, went round Bjorn Kvarme and Jason McAteer before brilliantly chipping James with an angled shot.
Coventry came out after the break like men possessed and their second goal was not long coming.
After 62 minutes, Huckerby forced his way past Kvarme, showing tremendous strength and pace, to fire in a shot that James did well to save at full stretch.
But it fell for Dublin who calmly pushed the ball into the empty net from 12 yards out.
Liverpool brought on Patrik Berger and Danny Murphy, but it made little difference.
Coventry could have chalked up an even more embarrassing scoreline but for the chances they missed.
However, with three minutes left the Sky Blues completed a historic victory when Huckerby again jinked his way into the box from the left, created space for a shot that hit the left-hand post to allow Paul Telfer to crash the ball back into the net.
Liverpool: James, Kvarme (Murphy 81), McAteer, McManaman, Leonhardsen (Berger 62), Fowler, Redknapp, Harkness, Riedle, Ince, Matteo.
Subs Not Used: Babb, Carragher, Friedel.
Booked: Leonhardsen, Harkness, Ince.
Goals: Redknapp 7.
Coventry: Hedman, Shaw, Burrows, Williams, Breen, Huckerby, Whelan, Dublin, Telfer, Boateng, Hall.
Subs Not Used: Ogrizovic, Soltvedt, Boland, Haworth, Shilton.
Booked: Telfer, Burrows, Williams, Whelan.
Goals: Huckerby 45, Dublin 62, Telfer 87.
Ref: M A Riley (Leeds).
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