It reminds me of the time, years ago, of seeing on a television news report one of our politicians visiting some soldiers doing some training involving live firing of mortars, probably on Salisbury Plain. As may be predicted the politician was asked if he would like to "have a go" with the mortar. I was amazed to see that the politician inserted the mortar round into the tube upside down with the fins pointing skywards. Fortunately one of the soldiers grabbed the round before the politician let go of it but I did wonder how anyone could be so stupid as to insert a mortar round into the tube the wrong way.