During NASA's Apollo 10 moon mission in 1969, not quite everything went to plan. But we're not talking Apollo 13-style disasters here -- instead, we're talking about some toilet-based issues.
Clearly the astronauts in question -- Thomas P. Stafford, John W. Young and Eugene A. Cernan -- hadn't quite gotten to grips with how to go to the toilet in space, as these NASA transcripts from the mission reveal. Tales of floating turds, sticky poop and inventive use of napkins is rather... eye opening.
You can read the full mission transcripts here. Or just spend the next few minutes inventing jokes about encounters of the turd kind. Your call.