Cycle Security Upset

[Tim Hall]

I tend to use mine to unbuckle a belt and progress from there.

Even when you're somewhere you shouldn't be, at a time you shouldn't be?

I'd say either the villain had very loose fitting trousers (or was wearing a skirt, or indeed a kilt), allowing a turd to slide down the leg unhindered, or the crapping was as @jefmcg said.