TLDR: I'd be FREAKING out!
Seriously tho THIS is the reason I'll NEVER parachute. This guy remains incredibly calm as his parachute gets tangled, then his reserve parachute gets tangled... It's a "clench" kind of video
NOT the first time this has happened obviously and thankfully it ended well. If that wasn't enough there are WAY more vids out there with this freak out factor.