‘A brunette, a redhead and a blonde break out of Holloway Prison.

‘They hide in a barn from the police and get into some sacks. The police
come in and feel the sack with the brunette in it. She goes “miaow”!

‘They go on to feel the sack with the red-head in it, she goes “woof!”

Finally they feel the sack with the blonde in it. The blonde shouts, “Potatoes!” ’