I heard this happened in the 2004 (or maybe 2003) MS150 Houston to Austin. There is a route that goes through some state parks with some steep hills. The roads are not the greatest and there are always a few wrecks to begin with. I don't know why anyone would do that? My guess is they believe it will only cause flats, at least I hope they do not intended on harming people.

Glad most people escaped serious injury! Hopefully the other rider(s) will recover fully and quickly.