Treating others the way you'd like to get treated yourself

I worked for unigate as agency,we had a guy called willie[William I assume]he was being bxxxxxxxd for loading a pallet of glass bottles right in the middle of a trailer,on his return all the bottles were spread across the trailer and smashed,the supervisor was shouting at him not to load in the middle,this was in front of me and six others,when the supervisor finished shouting willie as calm as you like replied in his Scottish accent OH DEAR,everyone just fell about with laughter so did the supervisor,so funny and the best way to deal with a situation like that