Prompted by the gaffe in England's recent game against Croatia, The Offside links us to Great Goalkeeper Blunders.
I've had my share of goalkeeper related misadventures, though not with Borat looking on. I've had the goalkeeper kick the ball off my shinguard into my own goal. I've also had a backpass to the keeper picked off in an amateur adult league game. Either the pass or the keeper was too slow- probably both.
:edit: added link to Robinson's blunder