Warning: Do not try these by yourself, not with friends, not with anyone! 

We've seen some crazy parkour stunts; yes, they require an insane amount of strength and agility. People jumping off fences and low-rise buildings with ease looks cool as hell, yeah. But what happens when people take the same stunts to skyscrapers?! You pass out by merely watching! 

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We stumbled upon this compilation of the scariest moments in extreme parkour on sky-rise buildings, and we are still dizzy in the head and queasy in the stomach. Do not watch this video standing in a public place. It might be a good idea to hold on to something before you click on Play. 

Parkour is not easy and even the pros can fail occasionally. Check out the video below to witness painful parkour fails. 

Now imagine these parkour fails from high-rise buildings!