Return after a war of 2 years that you survided, and then crash and die in you home country against a tree
jumping off of a plane with no parachute, at the highest possible altitude. so you suffer the longest.
Suisiding by jumping off a tall (really tall) building, and as you fall, your eyelid gets stuck by something, and gets ripped off, and you bleed to death while falling.
meh, would only affect someone with a fear of needles, and the needles alone wouldnt do too much dmg, if they were syringes then you could have them all suck the blood from your body slowly, but all youd feel is extremely fatigued, then pass out, then your dead.