1) Place a convoy of different vehicles (Hunter, HEMTT, Slammer)
2) set behavior to safe
3) setConvoySeparation to 100 for example
4) Place multiple waypoints, or a single waypoint very far
Convoy will move and at some point slower vehicles will fall behind. Front vehicles will slow down to wait for them. Slower vehicles will gain speed to catch up. The setConvoySeparation will be ignored and distance will be shortened and will provoke a crash.