Having bamboo splinters shoved under your fingernails until you bleed to death. The Japanese did that in WW2 to torture people.
Owch... That would suck. Another one: Having you head squeezed 1/2 a cm an hour. That would cause a slow and painful death, as well as some taunting psychological trauma; "OMG I'm gona die slowly!" Also, my friend once told me one from Thousand Ways to Die; Some cop or someone left his pepper spray out, and then he sat on it. The pepper spray sprayed up his butt and ate away his guts and stuff O.o talk about a fail-death.
Yikes, how/why were you in there in the first place? Here's another death that would suck: forgetting how to breathe; imagine the agony and trauma they would be going through!
if your guy than having this small fish that lives in south america (?) and it's attracted to things like urine and substances like it so if you pee in a river it will go up your *censored* and have two small hooks on it to stay in there and it sticks them out and hooks on the inside of your *censored* and you can die from it especially if you try and pull it out
who would be stupid enough to do that? anyway, i have this pikachu toy (who was an electronic but batteries dead) and he says: Pikachu: pika pi pikachu, pikachu pika pika pi! (translation: falling off the empire state building while getting shot buy 100 lasers (painful ones, energy)) yes, i can talk to all sorts of things. Me: getting pushed out of a spaceship without my spacesuit on a flying into the sun. both are pretty painful