Skateboarding has always been a huge part of my life. It really helped to shape who I am. I could write a whole post on the effects the skateboarding sub-culture has had on me. I started kicking around on a skateboard when I was about 8 years old in 1987 and it progressively grew into a lifestyle for me. I quit skateboarding at about 21. At that time, I became a UPS driver. I realized by that age I was not good enough to make a career out of skateboarding, but that I needed to find a career doing something. Skateboarding = injuries, broken bones, etc. Injuries = possible conflict with driving a big brown truck. Not driving said big brown truck = no money. Simple logic = stop skateboarding. However, I have always followed it and I still kick around on a skateboard from time to time.
Fast forward about 14 years, quite a few pounds and here I am teaching skateboarding to my students as a science lesson. One thing about hitting the "adult crash" for me was that I was super active in my younger years. The older I have gotten, the less active and larger I have become. Unfortunately this has hindered my ability to do the things I used to do on a skateboard. No excuses, it just is what it is.
Nevertheless, I brought mine and my kids' skateboards and we had a fun afternoon learning about how force, direction, angles, and of course density and weight effect motion on a skateboard. My own density taught us a lesson in gravity too, as it forced me to the ground a few times.
These two guys, especially, picked up on it right away.