As above, comedy like that doesn't often work.
That being said, I was on a
VB flight some time last year and they pulled off a very funny trick that worked well - The hairy-leg hostie up the front started doing the PA, but the regular female hostie down the back did the voice, so for the entire time the bloke up the front mimed it all and did a bloody good job of it.
Everyone LOL'ed.