Having watched Nigerians load their aircraft after having the aircraft in the U.K. for maintenance nothing would ever surprise me again.
Nappies and toilet roll were a favourite and we were forbidden to help them, one a/c was a Lear 35 and they filled the cabin virtually up to the ceiling, the pilot then slid into the cockpit over the top of his freight, it was so overloaded that the nose wheel steering packed up when he landed for fuel on route.
The other was a King Air, the crew got in then the cabin was filled with the usual including a TV etc, when they got to the door the other crew member got in and sat on the bog facing the door, his friends then packed the rest of the cargo in and tried to close the door to no avail, finally admitting defeat they took off just sufficient to close the door.