Yes, this happens to me too. But I have HORRIBLE luck with. Mainly because I cannot hold it back. For example, once I was at the funeral of my aunt, who died from breast cancer, so there was the priest, talkig, when out of nowhere, I get this insatiable urge to laugh. So there everyone else is, heads bowed down, listening respectfully, while I'm there sitting down, looking like my cheeks were pumped full of pressurised air, trying desperately, but failing, to not make a sound. It was VERY uncomfortable.
There's also the time in history class, when the same thing happened, except, thankfully, why teacher asked if I wanted to say something. I denied it a first, naturally, but it was when she asked again that I burst out laughing, for a solid five minutes straight. Eventually though, I stopped laughing, straightened myself up, cleared my throat, and cooly said "Continue." (like neil from shaun of the dead).
Ooh and also, in art, I was sitting on a table with three or four others, among them my friend jago, who is well known for being able to make me laugh whatever the situation, and our art teacher had come in to watch us (we had a substitute all year) and as she went around, jago whispered to me: (Hey... hey Cameron... you can see her bra). She the instantly swung around and asked "CAN YOU?". Then proceeded to thank him and and say tell me if it happens again. Cue 10 seconds of everyone on the table looking at each other dumbly, then bursting into laughter spanning a healthy ten minutes.
