X-Men (2000)

Trivia: During the last half hour of the movie, when the four X-Men are leaving in the jet, Logan says, "You actually go outside in these things?" to which Cyclops replies, "Well, what would you prefer, yellow spandex?" In the comics, Logan's outfit is yellow spandex.

Continuity mistake: When young Magneto is struggling with the guards at the concentration camp, the father's star switches from one side of his chest to the other. (00:01:46)

Revealing mistake: Just before Sabretooth grabs Storm at the train station he swats a guy aside who was standing in line behind Storm. You can clearly see a wire attached to the guy to yank him off-frame. (00:52:19)

Trivia: Stan Lee, creator of X-Men, has a cameo in the beach scene as a hot dog vendor. This was his first cameo in a theatrical Marvel movie. He would go on to have cameos in over 30 other theatrical Marvel films before he passed away.

Revealing mistake: In Toad's final scene of the movie, when he is beginning to fight Storm, he leaps into the air onto the balcony railing. If you look at the back of his belt, his wire is very, very obviously visible. There are several times within the movie when Toad or Storm has a wire showing, but none so obvious as that one.

Phoebe

Continuity mistake: When Rogue sits at the bar, as the bartender cleans a cup, a metal ashtray appears beside Rogues glass of water between shots. (00:11:20)

Hamster