One of the plastic seat supports. Take a peek at the bottom of a pivotal seat, they have like little cross-beam thingies, I cut right to that thing so I would look clean(ish) LOL.
Ouch, i did that riding shirtless before, was brutal, wetscreams make nasty grazes, the scabs kept cracking from bending down the tie my shoes and stuff, scarred as fuckkkkk