Grand prix snooker semi-final.
A few years ago, when the snooker was still in Aberdeen I had a mate who worked at the exhibition centre who scored us some tickets. The match in question was Higgins vs Fu (the semi-final if I recall).

During the final frame Higgins comes to the table and someone shouts 'go on John!'. Then right afterwards this little disabled chap on the front row lets out a yelp of encouragement. At first I didn't know what the noise was, then it clicked just as I could hear my friend sat next to me doing that giggling through the nose thing. For the next 5 minutes we kept setting each-other off; one of us would stop then a few broken breaths through the nose from the other would set us both off again. I was trying so hard not to laugh it was coming back round to bite me in the arse. What makes it worse was I was sat next to a girl of about 9 who at one point asked her dad what we were laughing at, a rather pissed off "I don't know" was the reply.
( Slippery Mick ‏, Wed 23 Dec 2009, 14:29, Reply)