Do you use their wheely bin?
A driver at my old firm told a story that he was caught short once and had a shit in the back of his van into a carrier bag.
He double wrapped it but the odour overpowered him leaking into the front cab so he found a lay-by and attempted to throw the bag over a hedge but it got caught in the branches of a tree.
Couple of days later he passes the same lay-by and notices the carrier bag expanded into a balloon still hanging from the tree as tho about to explode.
The driver often used to retell this story almost as if he was proud, but it always got a laugh.