Continuity mistake: When Cable blasts Warren off the balcony, Warren falls and drifts into the snow a couple feet, leaving an impression of his shape in the process. When he recovers, he emerges from completely under the snow as if he were buried, but the impression is still there in the snow moments later when he retreats, so it could not have refilled itself with fresh powder and buried him.
00:03:10 - 00:04:30Phaneron
Continuity mistake: When Cable grabs Warren through a shelf on his bookcase, he knocks several books onto the floor. When Warren pushes the bookcase over, there is an overhead shot of the floor surrounding the bookcase for several feet in each direction and there are no books visible on the floor.
Continuity mistake: When Warren shoots his blaster through the bookcase, the blast goes through some books/file folders that say "DNA Test 6" and "DNA Test 7" while "DNA Test 4" and "DNA Test 5" are warped out of shape. When he pushes the bookcase over, the two warped books/file folders are back to normal.
Continuity mistake: When Warren's girlfriend is saying "They say you keep a mad scientist up here," the earring on her left ear goes from being comprised of five gray circles, to four, and then back to five in the same shot. Both of her earrings are then comprised of four circles for the remainder of the scene.