Backflying can be relaxing, but on Tim Gray’s 17th jump, his first attempt looks nothing short of terrifying! It’s like a mix between the coolest theme park ride of all time and being stuck on a merry-go-round feeling sick. Unfortunately for Tim, this flat spin resulted in broken blood vessels in his eyes, face, and brain, followed by 8 months of intense migraines. Not fun. WARNING: Watching this may cause you to feel dizzy or cause your brain to explode.