As we got close to my house I thought I could just jump off the tailgate and if I ran fast enough I could stay upright, and my momentum wouldn't make me fall.
I was wrong; I don't give a how fast you were as a kid, you can't run as fast as a car even when it's going pretty slow.
That's sort of what happened to me one day on a skateboard. I just kept getting faster and faster and losing control. I thought I could maybe jump off and keep running for a second and not fall. Needless to say, that didn't work at all. I was so bruised up, skinned up, and very, very unhappy and sore for a while. I didn't care much for a skateboard after that!