I the same vein …I once knocked one o my gaffers flat on his arse(he was a good old boy,worked his way up from sweeping the floor)…. I had complained for ages about an access I had to use to get in to load a long wheelbase 6wheeler …wae a fair overhang. Anyway he came out and saw my problem then went away (I thought ) but he stopped to clean my rear camera /lights out o my sight,i missed him stepping behind the wagon. and yup I shunted/rolled back and the camera clicked on when I reversed only to see Ian being smacked in the back 
… he wasn’t injured just pride (both o us). ■■■■ runs for a while but lesson was learned.