Wired's Gadget Lab has a collection of six helmet cam videos, titled “Headfirst Insanity”. The videos include two surfing videos, footage of a bicycle race through a Brazilian favela, double- and triple-back-flips on skis, and a flying man.
Tip: Turn the volume down for the bike race video (to avoid listening to an out-of-breath Brit explain the course).
— Jonah Ogles