Watched the Dark Knight again.
Yes, Maggie Gyllenhall does detract from the movie; but on a positive note, she does get blown up. Once you look at her after reading the "face melting" comments here, you really do get the feeling that she was with Indiana Jones when they opened the Ark, but she forgot to close her eyes...
Back to the Dark Knight: Does anyone think that the Joker switched the detonators on the boat, so that if one of the crews had pushed the button, they would have blown themselves up? That seems much more in keeping with his character.