My worst wasn't a fancy restaurant (although it has happened). My worst was on a trip, met up with a really cute german exchange student. We were having lunch and it did not agree with me, excused myself and used the washroom, for a long time. I think I feel better, we hang out and talk for a bit more and then we leave, just as we're driving out of the parking lot I get that "uh oh" feeling in my stomach. Go back and park, do "the walk" back into the restaurant while my date waits in the car, and I'm in there in pain for another 20 minutes. She was really good about it, but still, it sucked.