Factual error: Tiffany asks a guard where he would go if he could travel back in time. He says he would return to 1999 to attend a Judas Priest concert he missed. He says he wasn't able to get close to Rob Halford. The problem is Rob Halford was not the lead singer of Judas Priest in 1999. Tim 'Ripper' Owens was.
Continuity mistake: The water bottle is down to the lower writing on the bottle when the scene starts. As the scene switches cameras back and forth multiple times, the level of the water keeps changing. The bottle also keeps turning.