Bugger.A student on a command course found out the hard way. As per the norm, the shotgun was barrel down at the time. Just like a door, with barrel contact or close to it cut straight through but dissipated and didn't damage the Unimog any further. Wasn't there at the time so can't comment on the situation of the why's and how's up to that point, but apparently ended up with a fine and maybe a period of days.
I was hoping for an admitted "I fcuked up but got away with it" tale.
Never mind, you'll be the culprit should I tell it on.