I think that this guy is nuts. There is no way that the Blue Man Group actually shoved a camera down his throat. I have seen the show several times, and even taken part in the "Getting a Closer Look at the Audience" sketch. Their camera, which is quite large, could never fit down someone's throat. Actually, to my knowledge, it never even touches the person's mouth.
The "footage" of the camera going down a person's throat is a pre-recorded video. It is the same in every show.
"The art of Illusion is the art of love; and the art of love is the blood-red heart of the world." - Tony Kushner, "The Illusion"