He doesn't have gas (no bodily functions involved)

[edible_hat]

This SC turned up at 8am wanting a gas bottle filled. At the time I was the only person working, so obviously I couldn't leave the counter for the few minutes it takes to fill a gas bottle. I told the SC that, he started going "Come on, there's nobody around, I'll wait in here and tell people to wait if they come, nobody's going to come anyway" etc. etc.

I still refused to leave the counter. I gave the SC the option of leaving the gas bottle to be filled and picking it up later, but instead he chose to hang around for 2 hours until my boss arrived.