Factual error: Fire extinguishers should be prominently displayed with no obstructions around them. The fire extinguisher was attached to a wall between the door and window, but it was partially obstructed or concealed by (artificial?) tree leaves. It also looked like the tree and plants might have been on a table that sets below the fire extinguisher, which could block the approach (wasting valuable seconds). (00:39:25)
Continuity mistake: Barney, Jim, and Angus enter a hallway that has a few lamps setting atop dresser drawers or tables. There are two lamps closest to the door; Angus stops after the first two lamps. When the camera shifts to a close-up, the hallway wall behind the lamp is no longer straight. Instead, there is an indentation (short wall) behind the lamp and the first lamp is not visible. Also, Angus becomes taller than the lamp in the close-up. (00:40:27)