Ironic how the FA Cup is now so important to Man UTD, given they decided not to participate in 2000.
Del Piero's header against Liverpool v. Anfield? The ref had blown his whistle, Carragher was walking away and Carson did not attempt to save it. You're grasping at straws lad, by that logic had Carsten Janker's overhead kick in 1999 which came off the bar gone in Man UTD wouldn't have won the treble.
Never argue with an idiot: they will bring you down to there level and then beat you with experience.