i higly doubt this is true.

Sounds more like a voice was dubbed in.

I coule be wrong but if you pay attention, Brett was mic'd Why? If he was just mic'ed it would still pick up the sounds of the people next to him responding to him. You don't hear anything but sounds in the distant background and Brett.
Also normal human reaction to a human, of hearing that story, would be to laugh and laugh pretty hard unless you have no sense of humor. Look at the people he is telling the story too, none of them are laughing and the one guy gives a smile here and there. If he was telling me that story I would be on my a$$ laughing and crying so hard lol.

But none the less it was funny as hell I was laughing my butt off lol