Why run? I've hit a brick wall going downhill on a bike. It hurts like hell, but it just hurt like hell. 25 mph is not enough to even guarantee a serious injury (even though it can lead to that, and yeah, in freak accidents can even kill you). However, this vehicles absolute top speed is 25 mph, unloaded. That's why I called out the top speed. It's not going to go 25 mph 99.99% of the time, it'll be going 10 or 15.