Men...Have you ever mistakenly zipped "Yourself" up in the pants?

My god....I went to the restroom one day while I was in cles and went to the urinal, did my business. But I think I shaked to hard or something. Without paying attention (and thinking about final exams), I effing zipped some of my skin up!....Holy crap..I yelped out loud! The pain was horrible! lol. The funny part was there was a guy in there taking a dump and when I screamed (like a quick 1 second scream of pain..), it sounded like all his constipation just drained out of him lol. After I got 'myself' out (took like a minute..luckily no one else was int he restroom),I saw the guy's legs twist like he was in pain or something. When I Told my mom about it, she laughed so hard and said, "Yeah, I bet you'll check yourself before you zip now!" She was right. I make sure I tuck myself in between my legs first before I zip now lol!!! Anyway, anyone had such an experience!? Luckily it wasn't zipped up too much...=(. Damn........