Helicopters can feel dangerous enough when theyre flying normally. But when they start doing flips, spins and nose dives, you get nervous just watching. This week, Red Bull posted a YouTube video of daredevil Chuck Aaron — the first and only civilian pilot ever to be licensed to perform helicopter aerobatics — doing just that. The 54-year-old pilot has spent more than 20,000 hours — or 833 days — in the air, so you can assume he knows what hes doing with these stunts. Without that experience, its safe to say videos like the one above wouldnt be possible.