The one that's just like a concrete block with few holes in the floor? God that shit's terrifying. Grew up in Russia and luckily never had to use one of those as they were never the only option. But if I had to, I'd rather shit my pants instead. Had to use shoddy garden toilets, squat toilets and toilets with no stalls before a few times each, all were awful experiences, but this thing, it combines all three for the ultimate discomfort.