Hole. Lee. Sh*t. This dude is insane. He decided it was a good idea to slackline across Yosemite Park’s Upper Falls, which is 2,500 feet above the f*cking ground. The craziest thing about this video is that this dude almost falls to his death. Around the 1:40-mark, this dude takes a stumble and almost falls off his slackline. He’s able to save himself but it’s still terrifying to watch.