Here's another cartoon submitted for exhibition at the 2012 Shrewsbury Cartoon Festival, the theme of which is "Flying". Though clearly this is about not flying.
This is a new version of an old cartoon that was published some years ago in a magazine that you wouldn't want to show to your family (you can see the original in this post). The festival organisers may not go for a cartoon with the word "arsed" in it, though they have included cartoons with naughty words in the past.
Festival events take place through April and May. The main weekend of free activities, now known as Cartoonists Live, which includes live drawing, workshops, talks and caricaturing, takes place from April 20-22. Visit the website for more.