The scariest experience is one I literally just had. I was away for a few days, so I thought I'd treat my dog and get down on the floor for him. Mounted me a couple times, and the last time it hurt, but not *that* much more than usual sometimes. Then when I thought I was pushing out his cum, it kept going, and going, and going.... Then I realized I was bleeding. Bad. Froze for a moment hoping it would stop, put my hand there somehow hoping it would stop, until I finally decided to sacrifice the towel after shoving in a menstrual cup because I had no idea where it was coming from. Was just praying I wasn't going to have to go to the hospital because THAT would be an awkward conversation. Put in a tampon I stole from my roommate (I'm on testosterone now, so I haven't had a period in over a year lol) and it seems to have worked. But FUCK I was so scared for a bit.