All this talk of endoscopes makes me think of the late great Robert Schimmel. As stand up comedians go he is a bit blue but I always found him hilarious. Sadly, he was killed in a car crash in 2010.
I was delighted to find this hour long gig of his on you tube (definitely not suitable for those of a sensitive disposition). His thing about endoscopes is in about the 54th minute.
http://www.youtube.com/watch?v=VECtmvxNRdc
