Well E, you sure have got me confused. I'm gonna go talk to my cousin at the community junior college. He teaches logic out there. Maybe you've heard of him. He just published a book a few months ago....
I guess what I am trying to say is Clayton needs this murder to look like an accident. Had he heard the machine go off and turned it back on, wouldn't that have looked really suspicious?
The whole point of the safety feature is to prevent people from getting ground up if they accidentally fall in. If somebody falls in, the machine stops. The only way they could get ground up is if somebody else turns the machine on.
If Clayton turned the machine back on, wouldn't everybody know it was murder?