Some of my favourites:
Hamlet: 'Alas poor Yorick. I knew him well'
Ingrid Bergman: 'Play it again Sam'
Cagney: 'You dirty rat'
Because they are all wrong
My favourite sporting quotation is snooker commentator Ted Lowe, in the days before everyone had colour television:
'and for those of you who are watching in black and white, the pink is next to the green'