I went to bed last night and took hours to get to sleep because I got thinking about great comedy moments, obviously there's different types of comedy that can give you a wry smirk, a snort, a snigger, a guffaw etc. But actual rolling about "Call an ambulance" type laughter, what causes that? I realised for me personally (and I know this tends to go against my misanthropic moniker) it's the contagiousness of someone else's uncontrollable laughter. Hence:
It's A Knockout; As if watching someone in an outsized foam rubber ogre costume desparately attempting to competitively run round an obstacle course wasn't funny enough, Stuart Hall gamely attempting to commentate whilst battling his hysterical laughter surely is.
The other moments are all devoted to Ricky Gervais; great as I personally think he and his comic abilities are, it's the bloopers and f**k-ups that kill me. His complete inability to film a scene without collapsing into squawking fits of laughter reduces me to the same state.
If you've got The Office or Extras DVDs, go to the bonus bits and watch the out-takes to see what I mean.
Also on Extras there's a bonus feature called Taping Nigel, two grown men behaving like naughty schoolkids out of complete boredom. Nigel the Breakfast Bunny, need I say more?