Continuity mistake: When Sara is being tortured in the bathtub Paul Kellerman receives a call. When we see a brief clip of Sara, her hair is a lot drier than it was a second earlier.
Continuity mistake: The positions of the coolers the clerk falls into changes between shots. Note the colours of them. (00:02:40)
Continuity mistake: When Bill lets Mahone out of the cage he's in, Bill has his left hand above the latch in one shot and not in the next. (00:16:25)
Continuity mistake: When Michael knocks the clerk to the floor, his head is next to 2 coolers. When the camera changes a shelving unit has appeared. (00:02:30)
Continuity mistake: When Sarah is being tortured at the end, her hair is constantly changing position. (00:40:00)
Continuity mistake: In the hardware store, the box with the vials in keeps changing from open to closed. (00:01:50)