Play http://www.youtube.com/watch?v=8NjbGr2nk2c whilst watching (without sound), http://www.youtube.com/watch?v=gfumAjScU9k

Sync them up playing both at the same time, for the humour.
Whilst Watching this (with the sound off): http://www.youtube.com/watch?v=gfumAjScU9k