Hamstring Endorphins
I think I experienced endorphins from an exercise for the first time. Something beyond The Pump. I was doing prone hamstring curls, and suddenly the pain became pleasure. I don't mean feeling the pain and getting pleasure out of that, but the pain itself vanished and was replaced with Heaven. It's like I was having sex with a woman and coming with each curl. My face did this contorted creepy smile that I'm glad wasn't visible, because I was getting the feeling of coming in front of 50 people, it was terrific; like I was in Heaven.