My boobs are NOT big enough to 'fall out of my bikini top' like sara's, but still had an embarrassing moment all the same.
We were swimming in the sea about 2 Decembers back, and I had one of those triangular bikini tops one - you know the ones which move around on the piece of string? Anyway, a wave 'opened' my bikini on both sides, just in time for my boyfriend's brother to see - he still blushes if we talk about it now. I think he was more embarrassed than me!!
I can still remember how his mouth opened and closed without a word coming out, obviously trying to warn me, but too shocked to make any sense come out of his mouth. LOL.