A Deathroll
You stand at the top of the stairs like a king. Stick your weaker hand’s thumb up your butt. Use the other hand to jerk off like a maniac. When you’re about to cum, jump down the stairs like a lunatic, still keeping that thumb stuck up your butt like it’s your life.
I deathrolled the stairs and my hand was still in my butt when I landed.
I went down the stairs like a monster, and my thumb was still up my ass.
I deathrolled and my brain almost exploded from the pain.