What is the riskiest place you've ever masturbated?

I'll go first: I was at the gym and for some reason I was really horny that day, watching hotties training didn't help. After working out I went to the communal showers and got a boner. There was only other guy but he was far, so I just turned my back and did it discreetly and quickly, no regrets, that day I REALLY had the need.