Watch and learn, from their mistakes...
http://my.break.com/media/view.aspx?ContentID=270492
http://www.break.com/index/disgusting_arm_break.html
http://www.break.com/index/skater_hi...on_street.html
http://www.break.com/index/face_firs...ment_wall.html
Not sure if this ones real,
http://my.break.com/media/view.aspx?ContentID=240104
But this one sure is,
http://www.break.com/index/bikefaceslam.html