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.
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.
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.
Answer: No, it was a fake, they used a stamp.
It is real.