I was staying at my grand parents house one summer when I was 14 and was in the shower. I usually masturbate in the shower once a week or so but had held off a while because I was in someone else's house.
I had the urge to jack off and decided to go for the gusto.
The first orgasm was the most powerful and shot all of the distance of the shower. The second one was alright but hardly a record breaker and the third and fourth ones just kind of dribbled out of my dick.
I would have done better to just j-o after the shower about once and hour. Now I can go seven times in a row.