When Mitch and Trey are almost forced out through the hotel window by the falling pool water, Trey handcuffs himself to Mitch with standard handcuffs. Later, when they are seen hanging from a rail the handcuffs have a much longer connecting chain.
In the brief low-angle shot of Robert De Niro's stuntman landing on the hood of the car during the garbage truck chase, a camera crew can be seen filming a different angle on the scene in the lower right of frame (may only be visible in 4:3 version of movie).
When Caesar shoots through the hotel door, his shotgun fires a 12 gauge slug that should have also shattered the room's window. The rounds easily went through the much thicker ceiling and swimming pool above.