The Change-Up

When Mitch is having sex with Mona on the bed, her bra is off and then a few seconds later it is on again.

When Mitch is at dinner with Sabrina, the water levels in her glass changes.

The water in her glass is low when she approaches the table and sits down, then after she takes a sip later the glass is full.

The shadow of the boom mic can be seen as Mitch and Dave are talking in Dave's office before Sabrina walks in.

In one of the office scenes, when 'Mitch' (Reynolds) is in 'Dave's' (Bateman) body, an open game of Freecell is seen on the computer.

Yet there are 4 cards occupying the ace boxes and 4 cards in the 'free cells' while the rest of the cards are in the correct starting position.

This would mean that there was an extra 8 cards in the game.

When Mitch, being Dave, is having an argument in bed with Jane, it looks like she's going to push him out with her arms, but in the next scene, she kicks him with her leg.

When Mitch (in Dave's body) says his new role is his "big break" to Dave (in Mitch's Body) outside the district office, his mouth does not match what he says.

When Sabrina is getting her tattoo done in her genital area, she is seen wearing underwear in different shots.

When Mitch is pushed out the door on the movie set to begin shooting, the door is room #69 and room #32 is across the hall.

The next cutaway shot shows him from what would be the hallway, and he is being pushed out of room #32 now.

At the beginning when Mitch is talking with his father about the upcoming wedding, Mitch's hair changes colour, length, and style several times back and forth.

Dave had to work four jobs to put himself through college, according to a conversation between his best friend and his wife, but at the celebration for making partner at his firm it is said that he had a full ride to Princeton.

But they then go on to say he graduated from Yale Law with no mention of a scholarship.

It is most likely that the 4 jobs were to pay for Yale.

As Mitch (in Dave's body) goes to Dave's work for the first time, his jacket is buttoned up as he walks in but in the next shot after the man says "Early morning on the golf course, Lockwood?" his jacket is unbuttoned.

Then when he goes in the room with all the food immediately after, his jacket is buttoned again.

When Dave (in Mitch's body) tells Sabrina he's on his way to see Dave just before she gives him the baseball tickets the motion of his jaw doesn't match the audio.