My Best Friend's Mistake - S1-E3
Audio problem: When Dr. Cox is yelling at Dr. Reed and he's saying, "For the love of Aisha," he's mouthing the word God, but "Aisha" which was dubbed over. (01:02:40)
My Overkill - S2-E1
Audio problem: When JD borrows the green scrub bottoms, the guy lending them to him says "Don't stain them" but his mouth stays closed.
Audio problem: When Turk comes in to tell everyone that Dr. Kelso has ruptured his eardrums, Dr. Cox starts to say, "Bob you stupid mother..." from the back view. Then it cuts to a different camera angle, and he is mouthing the words, "stupid mother" again.
Audio problem: When Bri-Bri says this hospital is hot his mouth moves before the words come out. (00:08:30)
My Best Friend's Wedding - S3-E22
Audio problem: If you look at the band's mouthes in the back round, they are completely out of sync with the song for a verse. (00:19:05)
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.
Answer: No, it was a fake, they used a stamp.
It is real.