To put it another way: If I mounted a GAU-8 on my car, put the car in neutral, and started firing backward from a standstill, I would be breaking the interstate speed limit in less than three seconds.
Randall is awesome.
BBs experience a lot of drag, so the shots from those further away will reach the train at a lower speed. This page gives estimates for the drag forces on a BB at various speeds. I love the internet.
This is probably my favorite new (readable) series on the internet.
I started laughing within the first 15 seconds and giggled the whole way through. The premise is so outlandish, but the physics so…not, that I can’t help but find it funny.