Years ago, I saw a wheel come off a motorbike sidecar, it bounced a couple of times and then smacked a drunk German sailor up the ass, it lifted him clean off his feet and dumped him in the harbour.
People say he cant be dead from that but people die from less all the time, that looked like that hit him at about 60mph, a truck tire would hit you like you fell from 3/4 floors high.