Continuity mistake: When they first inject Kevin Bacon with the stuff that makes him invisible, he thrashes around in pain. He lunges to his left breaking the strap holding down his right arm. In the scenes that follow his right arm is still strapped in. They even unstrap him to let him up.
Continuity mistake: When Sebastian goes to Linda's apartment to catch her and Matthew together, we see Linda welcome Matt by pulling her jeans down. Matt picks her up, hands on her bare butt. After he carries her into the bedroom, Sebastian throws a rock through the window and we see them on the bed, her jeans are pulled back up to her waist. Not the direction clothing usually goes in such situations.