Continuity mistake: Buddy is unloading boxes of tiles in his garage while Riley and he discuss the radio station programming. There are 8 boxes on the shelf and Buddy unloads another two boxes. A minute later, the same two boxes are back in the truck bed, and Buddy unloads them again.
Continuity mistake: When Billy is taken up to that area by the guard that tries to rape him, when the door opens to go in, there is another guard on the inside that closes the door. But after Billy kills the guard, somehow that other guard is nowhere to be found - does Billy kill both guards?