Continuity mistake: When the doctor tells the agent he has to step behind the shield while they take the pictures, you can see that Augie's chest strap has already been secured. The very next camera shot shows Cinnamin (as a nurse) just starting to secure his ankle area with the straps, and you can see the chest has not been secured yet. A second mistake in the same timeframe shows Augie's unconscious head turned to his left. When she starts to secure his ankles, you can see his chin pointing straight up.
Continuity mistake: Tina demonstrates her contortionist abilities by crawling through the cubicle shelves in Briggs' apartment. A large orange cat figurine on the upper left shelf is brightly lit when she's doing her demo. The moment she finishes, though, the cat is in shadow and its orange tones are muted to brown.
Continuity mistake: Rollin strikes the duplicate diamond with a hammer and chisel, and it breaks cleanly into several pieces that fly out of the dish entirely. In the next shot, however, all the pieces are not only back in the dish, they're crushed into a fine powder.
Continuity mistake: After the gun goes off during his fight with Yankovski, blood appears on the right side of Rollin's mouth: it wasn't there a moment before. And a few shots later, the blood is on the left, then changes back to the right. (One shot in the sequence was, for some reason, flipped.)
Continuity mistake: When Briggs listens to the recording giving him his assignment, the tape isn't even threaded, so the machine shouldn't be playing anything. When he stops it, the tape is now threaded - but it's now a completely different tape reel on a completely different machine.
Continuity mistake: After Rollin is in a fist fight he has blood on the left side of his mouth. After a quick scene switch to another person when it goes back to him the blood is on the right side. Another quick switch and back to him, the blood is back to his left side.