Glenn Murray sent Brighton into the FA Cup fifth round after they finally saw off West Brom.
The striker climbed off the bench to score twice in extra time and clinch a 3-1 fourth-round replay win.
The Seagulls will host Derby next week after coming from behind to win at The Hawthorns.
Kyle Bartley's bizarre goal, when the defender hooked in from almost behind the goal, opened the scoring late on.
But Brighton's Florin Andone levelled with eight minutes left having escaped a first-half red card following an elbow on Sam Field.
It meant extra time and Albion finished with 10 men after Robson-Kanu limped off with the Baggies having made all their substitutes before Murray proved the difference.
The forward, who had only been on the pitch three minutes, struck in the 104th minute as he bundled in from close range when Ahmed Hegazi failed to cut out Locadia's cross.
He then sealed victory after 117 minutes, lifting past Bond from close range.
FA Cup fifth round draw in full
- Bristol City v Wolves
- AFC Wimbledon v Millwall
- Doncaster v Crystal Palace
- Newport v Man City
- Chelsea v Man Utd
- Swansea v Brentford
- QPR v Watford
- Brighton v Derby
Ties to be played February 15-18
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