Continuity mistake: At the dinner, Therman and Barry are pretending to shoot their "mind control" at each other. Therman is standing to the right of the woman in the purple dress and pretends to grab something from her cleavage and throw it. Then it cuts to Barry pretending to catch it, and he's standing right next to the same woman in the same spot where Therman threw it.
Continuity mistake: In the scene where Tim and Julie are arguing in the elevator, the elevator keeps closing on Tim's arm. Barry then arrives and helps his new friend by pulling on Tim's free arm to get him unstuck. Barry pulls too hard and they end up falling on the floor. This is where the scene is incorrect because it shows that Barry has a hold of Tim's Leg and not Tim's arm.
Continuity mistake: When Tim throws out his back, the film is edited so that you see Tim in the hallway, and next scene you have Tim on the couch. When Tim attempts to go into his bedroom, he falls to the floor. While you see Tim crawling to his bedroom, you see Barry watching in the background, but you also see a busted table next to the couch. No scene is given on how the table broke. However, in the trailers, you see Tim crashing into the table when he enters his apartment.