oh no!!
Good idea.....
but bad...I think RC are expensive enough, that us : Builders, Creators, Drivers... Should only be the one using it...or at least like Billiam411 sayd, watch the damn person driving it.
like I know if it hits front end of my car, I know wich parts will probably break/get loose/fly away, same for the rear end and other sides...and from there I'll know what to repair...
anyways you got lucky...and thats an other good thing about RC 90% of the people are really nice, they help each other, even if you are a total stranger