HAH! I performed that same stunt in the 1st photo on my..... you guessed it... '75 DT400 at the age of 15. We lived on a small valley and I would practice riding a wheelie over the Crest of the hill. Well, I got a little bit too vertical and my feet slipped off the pegs resulting in me hanging from the bars, laying on my stomach across the tank and seat, while dragging my feet in the dirt. All the while heading for a fairly busy road. Luckily my out of control bike veered into a snow fence just before the road. No broken bones, but this crash started the transition from enduro to dirt bike due to stripping off a few mangled pieces.