Here is a story:
A chap called Billy spent a night on a sofa. In the morning Billy helped himself to a breakfast of whisky and cat-food. He did declare "''tis the finest gravy you ever did taste." (or very similar)
This story had been around a bit, and exploited for amusement. I thought I could get some more amusement from it...
Eating cat-food "freaks people out", it's a potential party-trick and April-fools' joke, so here's how you can do it.
Step 1: Things you need
Two aluminium tins of cat-food, of the type pictured. Choose whatever flavour you like, but aim to have the filling match the description.
Red-meat and offal, I used steak and kidney.
Gravy, I was lazy and bought a tub from a butcher.
A sharp knife, scissors.
A kitchen, with kitchen-stuff in it.