It turns out that Jimmy does a lot of visiting of returning injured troops and gets a lot of his material from them.
The troops are the ones backing him in the debate this joke has sparked saying ...this is the kind of humour that troops in action use to help sustain them.
Some of his other stuff ...about fat people?
It turns out that fat people are falling about laughing at themselves at his shows and queing up for his autograph after the show.
It has sparked an interesting debate in media and entertainment circles about political correctness not having managed to kill British humour.