S1·E1 Brett Venom, M.D.

Sanjay and Craig, upon hearing that Sanjay's mother is about to help in a "butt transplant", try to sneak into the hospital to view it. They disguise themselves as doctors and discover that the patient is Mr. Noodman, their neighbor who is terrified of snakes (Craig is a snake) and he then causes panic throughout the hospital before Sanjay's mother successfully completes the surgery.