In Rwanda there are some big scary green buses donated from Japan. Generally they're driven into the ground, but they're cheap so sometimes I had the pleasure of green bus travel. Then, one day, we decided that instead of crossing half the country to get from Gisenyi to Kibuye, it'd be fun to catch the green bus down the lakeside. Mistake.
As they are about half the price of an ordinary taxi-bus, they are piled with people and luggage and sacks of beans and chickens and goats and practically anything that will fit through the door or go on the roof.
We got on and had to stand. But with sacks all over the floor, only one foot would fit on the ground. This one-footed standing lasted for about 5 hours of the ride, which was in the stifling heat of the dry season. Rwandans have an aversion to opening windows on buses so we were literally dripping with sweat the whole journey. However, we'd expected this to an extent and it would've been fine on a normal road. But the lakeside road turned out to be a single-track (or less than single in places) mud road along the edge of the clifftops. The road had washed away in parts, there were no passing places should something come the other way, and no barriers to stop us plummeting down the cliff into the lake.
All this time we were, of course, causing much amusement to the locals who couldn't believe that Europeans were taking the green bus.
Finally, about an hour from our destination, someone got off and I was given a seat (well part of one). I sat down, glad to finally be able to rest and to be by a window. And then the girl beside me promptly turned round and vomited all over my feet. Strangely, I repeated the green bus experience from Kibuye down the lakeside to Cyangugu. But I really will never do it again. It was an experience but if you see the green buses in Rwanda, best to steer clear.