A friend shared this video to me via Facebook. I found it was absolutely hilarious. It is very UK-specific humour, but I know I have some UK readers.
It possibly needs an explanation to non-UK readers that we are very much not a firearm culture. Most of us have never even seen a gun, except in the hands of a policeman. So you have to take the video in this context.
I realise that in some places, this might be a little too close to reality to be funny. If it offends you, I apologise.