Continuity mistake: At the restaurant, when Bertha is taking Fred's mum and Mr. Devlin's order, the way she holds the notepad and the pen constantly changes between cuts. (00:29:40 - 00:30:45)
Continuity mistake: At the restaurant, when Bertha goes to the kitchen and speaks to Fred, the way Fred holds the sock constantly changes between cuts. (00:30:59)
Continuity mistake: At the restaurant, when Bertha is taking the family's order, the way she holds the notepad constantly changes between cuts. (00:31:46 - 00:32:14)
Continuity mistake: Kevin crashes his bike into some trash cans near the end of the film. When he is shown again, the trash cans and his bike change position. The tree shadows seem to disappear as well. (01:19:04)
Continuity mistake: In the 'match' when he tags with John Cena, Fred is picked up by the rival vampire in a fireman's carry position (kinda like for Cena's Attitude Adjustment), but his head is over the opponent's right shoulder in the first, wide, shot and towards the left shoulder in close-up.