Well it's kinda obvious innit? The deal is not ripping of, it's causing a hilarious situation and bringing it to the masses. Welcome to comedy mate.
You don't "rip people off" you further spread the joke. This one is kinda old, and the funny thing is not only the jokes, but the way it was made. The clip still makes me laugh my arse off more than readin it ever will. I have to say, this, and the very first Epicine episode is nothing short of a work of art. It's hilarious on a level that's almost uncomprihensible. That it can continue to be so funny simply proves that it's masterly made.
You can take the funniest joke in the world, and have someone with no sense of humour tell it. Odds are, no one will laugh. Yet a medicore joke told by the funniest man on earth will have people screaming! It's all about how you deliver mate. The joke in itself, it not important!
Tm