I went to a town about 4 hours away for spring break one year with some friends.
We were hanging out at a friend's sister's apartment, having some drinks and exchanging laughs over stories, and decided to go out to the bars to continue drinking.

While out at the bar, the friend's sister met up with some friends and I hooked up with one of them. I brought her home, and after a lot of smoking and drinking, we take things to the bedroom. She's getting into it while she's on top, gets over-enthusiastic, and goes up too high, I pop out, she comes down, and my dick becomes a 90 degree angle. I start screaming bloody murder.

She's looking at me, I'm looking at my now pulsing dick, and she asks "you ok? Do you want to keep going?" All I can muster is "take me to the hospital..."

When we get to the hospital, I'm sitting in the corner, rocking back and forth like an abuse victim staring out the windows at the rain falling. I finally get called to the triage nurse, and she asks "what's the problem tonight?" I'm a fairly educated man. But after drinkin and smoking, all I can come up with is "I. Uh. I. I hurt myself". She looks at me with the biggest "duhhhhh" look I've ever seen... So I try again "I hurt. 'Myself'" as I point down at my aching crotch. A flush of understanding comes across her face, and she immediately says "oh. OH! Well that happens more than you know". Fast forward to the doctor inspecting me, and tells me "well.... You won't be playing with yourself for a few weeks, that's for sure"

I still have to explain this story every so often when a girl gets close to my dick and notices a small "indent" on the right side near the base