Beenthere wrote:
I giggle when I'm really nervous...it can be annoying as heck...but I can't help it.
Oh gods has this predilection gotten me in serious trouble, more than once.

Yes, in certain very awkward situations, I've involuntarily laughed, very inappropriately.
For example, years ago I had a co-worker friend who spent a lot of time fretting and stressing about trying to attract the romantic attentions of another co-worker of ours. And I found myself in that all too familiar position of being her confidant. There was a time when she was going on about how she did this blah blah blah, and he didn't react blah blah blah... And I was listening, sympathetically, as always; but I suddenly found myself at such a complete loss as to what I was supposed to tell her, felt so much of her frustrated pain over the situation, felt the sting of awkwardness with the situation, that I just started laughing - out loud.
And it seemed like a very real laugh, like I might have been laughing at her, at her situation, her pain.
And the look she got on her face when I did that still haunts me today. Our friendship kind of disappeared after that.
I'm not stupid; but I behave stupidly sometimes, despite myself.
Good fortune,
- Icarus laughs at funerals...
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Please forgive me if, in the heat of battle, I sometimes forget which side I'm on.