I was driving a bus with my friend in .60 experimental and occasionally he (as passenger) would see me come to a complete stop. As the driver the bus would keep going pretty normal. Eventually I would bump into something or hit a road block or tree, and the bus would rubber band back to where my friend was in the bus.

We tried to reproduce it, and we tried with more people in the bus, and for some reason it actually seemed to run more stable with more people in the bus than just 2.