Pretty much literally.
I'm not sure if the baby's impersonation of a nutter preacher is funnier than the fact that clearly the audience really don't get it.
You decide :)
(Shamefully nicked from Graham Linehan's blog http://whythatsdelightful.wordpress.com/ - plus he wrote Big Train, one of the funniest comedy programs ever. In fact, I feel the need to watch the World Staring Championships again. My sense of humour to a T :) )