That poor girl's knees.
Amusement parks are a place for completely appropriate, PG-13 rated family fun. Unless you're this couple that decided to make sliding down a waterslide a little more X-rated. Because you always think about simulated sex acts when sliding full-speed down a slippery death trap of water and plastic. Obviously.
Okay, so this doesn't really look like any amusement park I've ever been to (lookin' at you Mountain Creek). It actually looks like a bunch of college kids started drinking, grabbed a giant tarp, set it up on a hill, and let loose with a large supply of water and some dish soap. I assume this because I have done this, and let me tell you, it hurts. That poor girl's knees.
[h/t HyperVocal]