Continuity mistake: Just after the fight scene outside Stifler's house, Jim is talking to Michelle, his dad and the guys. Jim is seen throughout wearing the leather bondage outfit, with a collar that contains three rings. The rings keep changing positions around Jim's neck throughout the scene. (01:17:00 - 01:20:00)
Continuity mistake: In the movie Band Camp, which takes place in 2005, Jim's dad tells Matt Stifler that Michelle is pregnant, so Jim's son should be 7 years old in this film, not 2.
Continuity mistake: When Jim is talking to Kara at the end of the movie, her hair changes position with every shot. From covering her entire shoulder to not covering her shoulder at all.
Continuity mistake: When Oz is talking to Mia outside near the start, she puts her hands on her shoulders when she says "that's so cute!" In the next shot they're lowered, and she puts them on his shoulders again.
Continuity mistake: When Stifler is shitting in the box, the beer near AJ falls down but is upright in the other shot.
Continuity mistake: At the beach on the lake, while Jim and the others are talking and watching Oz's girl, the sun changes between shots.
Continuity mistake: When Stifler is stealing the jet skis and craps in the cooler, the sun changes between shots.
Chosen answer: They have been friends for a long time. They had plenty of time to take pictures. We only see them on screen for a few hours of their lives spread over a short while.
Greg Dwyer