I used to sit on the station wagon tailgate when the car was jam packed full. One day I thought it would be funny to hop off and be missing once we arrived home, so I did so about a block away. The car was doing about 30mph. That was when I got my first physics class for seven year olds regarding moving and stationary objects, velocity, and deceleration. I looked like a road rash pizza for about a month.
>>> I looked like a road rash pizza for about a month.
Wow. We were so much more cautious. We only tried dragging our feet along the road, while sitting on the station wagon tailgate, while being driven along a gravel road.