My Choosiest Choice of All - S3-E19
Continuity mistake: As Kelso is walking out the door with the blue paint on his face, one hand is on the push bar for the door and the other hand is down. Cut to the shot of him walking out the door and now his right hand is pushing the door open and his left hand is just coming down from pulling the alarm wire above the door loose with no time for him to have changed positions.
My Choosiest Choice of All - S3-E19
Continuity mistake: When J.D. comes out the bedroom and finds Turk and Carla waiting, Turk's hand goes from cupping his chin to resting on his fist, depending on whether the shot is from the front or from the back.
My Choosiest Choice of All - S3-E19
Continuity mistake: While J.D. is using the megaphone his hands switch from left to right from holding it when they show his back to camera and to front. (00:02:50)
My Choosiest Choice of All - S3-E19
Continuity mistake: The alarm wire is hanging down behind Dr. Kelso when he's talking to the janitor. But when Dr.Kelso exits the door he pulls the wire out of alarm. (00:11:10)
My Choosiest Choice of All - S3-E19
Continuity mistake: Carla's left hand goes from holding the coffee cup with whole hand to just gripping handle the next second. (00:00:40)
My Choosiest Choice of All - S3-E19
Other mistake: When Carla goes to inject Irv with the syringe, she doesn't push the plunger down, but Irv still falls unconscious.
Answer: No, it was a fake, they used a stamp.
It is real.