Continuity mistake: When Turk marks the location for the surgery on Pvt. Dancer, he makes a horizontal mark on the left side of Dancer's abdomen. You can also see a small scar on Dancer's right side opposite the mark. A couple of shots later, Dancer is shown from the front and the mark has now switched to the right side above the scar.
My Fishbowl - S6-E12
Continuity mistake: In episode 6-12 "My Fishbowl," the janitor waits outside a door holding a fishbowl. The door opens into the room as seen several times. You can even see that the hinges are set up to open in. When the janitor sets the fish bowl down you can see that the door has changed and opens out into the hall.
Continuity mistake: While Dr. Cox is talking to Dr. Reid about drug addicts, his finger is in the air, there is a cut from in front to the back and his wrist band changes position in what is an instant cut.
Other mistake: When Elliot sits down next to imaginary Laverne, Carla must have imagined her brushing against her sleeve on her blouse.
Factual error: When Lloyd is driving Jack back and listening to speed metal, his gear stick is in park.
Continuity mistake: Near the end, when Elliot, Carla and Jordan are in the bar, the waitress brings them three drinks; two short, clear ones and a cosmopolitan with a lime. A few shots later, Carla is seen from the front drinking the cosmo. The next shot from behind her shows the drink instantly on the table. The drink switches instantly between her hand and the table several times in the following shots.
Their Story - S6-E17
Continuity mistake: When Turk is talking to someone about the teenager getting breast implants, in the first shot you can see he is talking to someone in a a blue shirt with a stethoscope - i.e. JD. However after this shot, JD has vanished and the conversation is suddenly with Todd.
Revealing mistake: Right after Dr. Cox gives the results of the patients STD tests, the shot switches to show Turk, JD, the Todd and Dr. Kelso. Before the sprinkler activates you can tell that their hair is already wet from previous takes.
Continuity mistake: While Kim is holding the baby for the first time, she has her right hand under the baby. When JD asks if he can hold the baby, her right hand has moved and is holding the baby's head.
Continuity mistake: Turk says two players are needed to finish the game. Carla later says she has finished it several times herself when playing in the middle of the night.
Factual error: The Toyota Prius uses an electronic transmission that requires the ignition to be turned on. Since J.D. said that he had no idea how to operate the car, he could not have pushed it from the parking space because he wouldn't have been able to put it in neutral.
Other mistake: Elliot told Kelso that he was getting a chocolate cake for his birthday, because she likes chocolate cake. At the party, the cut cake that everyone is eating is white. (01:42:00 - 02:04:00)
My Bad Too - S7-E7
Continuity mistake: After the kid collapses walking across the stage, J.D. and Eliot sit down in the cafeteria and start talking. J.D.'s hands are under the table. The shot switches and J.D.'s forearms are now resting on the table.
My Princess - S7-E12
Continuity mistake: Dr. Kelso already quit his position as Chief of Medicine, but he's back in the beginning of this episode.
My New Role - S8-E7
Audio problem: Season 8, episode 7 "My New Role": Before the opening credits, JD taps a pencil against a cup, and other various devices in the hospital start making a song. At the end of this song, the Janitor can be seen playing the bongo. The rhythm of his hands do not match the rhythm of the bongo sounds at all. After the song ends, JD turns to the Janitor, who is again playing the bongo. This time, however, his rhythm of his hands do match up with the rhythm of the bongo sounds.
My Absence - S8-E9
Continuity mistake: Elliot slips her phone in Dr Cox's left coat pocket. When he hears JD's voice later when his coat is over the back of the chair, he pulls the phone from his right pocket.
Visible crew/equipment: When the elevator stalls, Ted and Gooch start singing their state songs to Cox and Kelso. As they start their song for Arkansas, a boom mike momentarily dips just a bit into frame at the top.
Continuity mistake: When Drew and Denise are having their awkward moment in front of the elevator, watch the background. Colonel Doctor walks by twice in the same direction.
Continuity mistake: In this episode Cole has a mole that is found to be cancerous, the mole is not seen in any other episode. He is topless in many episodes and the mole is not in any other one.
Continuity mistake: When Kelso and Cole are sitting in the bed talking, watch the position of Kelso's arms and the juice box he is sipping from. The juice box, straw, and Kelso's arms all move around from shot to shot for the entire scene. Towards the end of the scene there is even one point where Kelso puts his arm down, the shot changes, and Kelso puts his arm down again.
Answer: Dan was drinking beer and Cox feared that Dan might get so intoxicated he would fall asleep and drown in the tub.
Mortug