It's a very, very underrated movie. Here's my issue; how is Superman able to get drunk at the bar when he's still got his superpowers ? Granted, he's becoming 'evil,' but that shouldn't change the fact that alcohol shouldn't have any effect on him. Secondly; when the "good" superman comes out of the bad superman's head, he goes on to kill him. So are we supposed to accept that the original superman is gone ? We have to assume we're left with a carbon copy, right ?