This reminded me of an oft pulled prank.
While flying for an African Cargo "Airline" we had the contract to repatriate illegal immigrants from South Africa back to Malawi. Once loaded I would walk through the cabin, to the cockpit wearing dark glasses and tapping a white stick on the floor of the Dak then bump around a bit before finding and settling into the seat. Used to raise quite a few eyebrows and prompt a number of hail Marys.
We used to do some very naughty things to entertain ourselves, invariably at the expense of the undesirables on board.