that happened to me when I was younger lol but I think it was even worse, at a pool with everyone from school. I was sitting on those wooden picnic tables, and a piece of wood must have caught on my bathing suit because when I stood up the back of my bathing suit ripped right open

and, its a bathing suit... so there is no underwear underneath... such a stressful situation lol I think I just wore a towel around me until I changed... no more swimming :(