You might find this thread of interest: Elephant charge target sled

It's a target I made to prepair for ele hunting last year.

And since the target stuck out a bit, if the car dragging it passed by very close, it was possible to be hit by the target as it passed doing 40 km/h!

This forced me to jump aside a couple of times after firing of a shot or two. Or else I would have been hit on the head. So your thread topic of "kill or be killed" is the right term!