You could technically have combined the worst and best thing threads that you just created. You could be on fire while falling into a pit of acid spikes while meteors bomb the earth and the sun explodes while Justin Beiber has a mandatory concert and Satan comes and brings all the souls into Hell while zombies attack the few survivers and volcanoes cloud the earth in ash and earthquakes destroy the continents.
I don't think there is an answer to that because every time I think of something worse, something even more worse pops into mind. I'd probably say getting taken and tortured till I'm about to pass out.
Listening to Rebecca Black's Friday. Or listening to Justin Beiber. Or falling off a cliff while having a good dream. Or getting taken by the grim reaper while posting on this thre-...
Being fed into a buzz saw feet-first very slowly on a conveyor belt, while a swarm of bees stings me everywhere, while being very dehydrated, while being forced to listen to a Bieber-Black mashup, while being forced to watch daytime television, while having each finger strapped to cars which take off in different directions at random times.