Continuity mistake: When JD jumps out of the bed in the ambulance, half the sheet is hanging on his left shoulder. Then it disappears from his shoulder and suddenly appears again.
Continuity mistake: When Elliot and her dad is at the bar and he says "It's a hell hole" his glass is on the table. When it cuts he suddenly has it in his hands.
Character mistake: Throughout the series, JD and Turk are shown to be major sitcom geeks. At one point in the episode, JD says to Turk he Marcia Brady'd his ass, and explains what it means. Turk responds along the lines of "Yea, I know. 'Marcia Gets Creamed' Season 5 episode 3. Don't ever question me about The Bunch!" 'Marcia Gets Creamed' is season 5 episode 10. Episode 3 is 'The Elopement'. Not a mistake a couple of geeks would make.
Continuity mistake: When Jordan gets to Dr. Cox's place and explains how she got pregnant she says "Oh, the bus boy, the pool boy or something boy." Dr. Cox place both his hands on his face. When it cuts he's only got his left hand on his face.
Answer: No, it was a fake, they used a stamp.
It is real.