What was the most embarrassing time, when you wet yourself?

On the train home after a night out on the town. I hadn't bothered to use the toilet beforehand because I thought there was one on the train, but there wasn't so I wet myself in front of a carriage full of people

I wet my self on a school trip on the bus on the way home.

While working late,full of coffee, and suddenly getting badly startled by the girl I was working with. She kept my secret,but still teases me