Wear it. Your buddies might give you grief about wearing armor, but at some stage everybody falls.
I would rather be called a pussy and be able to stand up after a bad fall than spend 6 weeks in pain hoping I don't sneeze because because ribs got cracked in a rollover. Getting an injured buddy out from a remote trail is not easy.
My armor has a full back, chest, elbow and forearm protection, so all I really need to add is some knee guards.
I know I ride too fast on narrow winding mountain trails through trees and rocks in BC, and that sooner or later I will fall, so I am prepared for it.
By the way Loco, I think you must have way too much free time to have found a link to a video like that. makes you wonder........... Just kidding