Unreal, test drive in public with big hoe on back??? Sounds like on top of it all you put an inexperienced driver at the wheel?? You are testing a problem, you should be on your toes for anything, you feel trailer wiggle, you hit trailer breaks and wiggle gone.
Not even worth going down the path of test driving a problem vehicle in public with big hoe on the back.
Heads should roll from all directions.
Really pathetic when these tragedies happen and they are 100% avoidable.
Joel