commensense, yes ,but safe conditions also.
Most work sites don't comply with 100% safety, so a dash of commensense is generaly required .in the case of what Wiesy wrote about first, the people in the broken down car should not have left the road.to leave the road and wait elsewere was truly a lack of commonsense .but the bones being ground in a grinder, to feed the grinder and expect never to have an accident by the virtu of being super careful, is asking for trouble, the batch hopper idea is the way to go remember it not how fast the job gets done is the only consideration it's that the employee gets to go home uninjured and alive after work .