Any film directed by someone who willingly calls himself McG is bad enough but the fact that he got the green light after Charlie's Angels 1 to make ANOTHER!... just baffling.
How about "Skycaptain and the world of boredom" or bad boys 2, pearl harbour, transformers 2... there's a couple but The Avengers is the one, never HAD to stop watching a movie before but I could feel my mind "falling away like a wet cake" OH! and that Batman with arnie in it which ever that was called. Oh look they're playing ice hockey with a diamond and he happens to have ice skates in his boots, DONE! Let those two films fight to the death and then kill the winner.
EDIT: Got it, The Wicker Man remake. Go find the video on youtube of Nick Cage's 'best' moments, "HOW'D IT GET BURNED?! HOW'D IT GET BURNED?!!!"
Stunning, just stunning....