sort of. it only happened once though, with my ex girlfriend. we were going at it, she was on top...my god was she good on top too. grr, anyways...she started shaking for about 10 seconds or so, but kept going. right at the end I felt this rush of fluid and kind of felt a puddle. I knew it wasn't me, so I was like, "Umm, was that you?" She didn't even realize it, but I guess had gotten so wet that when she had an orgasm it just competely decided to stain my sheets.
probably my favorite sexual experience ever I must say. So it wasn't really a 'squirt', but pretty close.