I find some of the Commons debates to be very funny, especially when the whole house goes up in uproar over something. I think it was back when Stephen Byers was about to get fired, and everyone knew that he was for the chop, and he was trying to do a speech in the Commons and getting jeered from every angle, and then one person shouts out:
"Bye! Bye!"
Failing that, there's always a condom of blue powder thrown at the PM to liven things up.