Cyclist Silas Patlove, who documented the 30-MPH crash above via helmet cam, wrote on YouTube that he survived the ordeal with only "a mild concussion with a bit of memory loss around the event." If only the same could be said of the other guy.

A Highland Park firefighter who spent last year posting helmet cam footage of his Detroit-area firefights to YouTube concluded 2012 by uploading an 8-minute highlight reel of his better action shots.