Oddest booing I ever heard down here was half time of a game v Pompey about 10 years ago. It was that game Sulley Muntari hit a couple of wonder goals yet we'd actually battered Pompey for the first half so were very unlucky to go 0-2.
It was a fair bit of the crowd aswell, I could only work out they were booing for the crime of losing 2-0 at home to Portsmouth (and Pompey were a decent team at the time of course).
Two outstanding strikes from Sulley Muntari helped Portsmouth to a sixth straight away win against a shell-shocked Aston Villa.
Villa dominated the first half but fell behind early on when scrappy play in their penalty area led to Craig Gardner prodding the ball into his own net.
Muntari's first was a left-footed strike from 25 yards and he then beat two defenders to score with a low shot.
Another one was I think later that season v Wigan. 0-0 at half time and boos which upset MON. The sort of game where we still wouldn't have scored if we were playing now.
Rubbish performances I can get. Don't understand when we have actually played well but just haven't won the game as with that Wigan one.
Edit: Honourable exception being of course the Bradford second leg!