I\'ve thought of another one - this is a good one! I know someone here has read the short story, "The Jaunt" in Stephen King\'s short story collection, Skeleton Crew.
It\'s the future - a scientist has just created the first transporter technology. Consists of two portals - walk into one portal, come out the other. The scientist uses lab mice before human subjects, but the mice keep coming out dead, or nearly dead. He figured out that you must be unconscious in order to successfully "Jaunt". Several years later - convicted felon is offered freedom if he\'ll go through the Jaunt while fully conscious. He goes through, comes out, hair is white. He says, "it\'s an eternity in there." Apparently, while it only takes the body a fraction of a second to pass through the portals, it takes the mind many many years, possibly millions? When the mind finally does catch up with the body, it\'s such a shock, that you either go insane, or die, or both. That\'s my #1 worst way to die. Stuck in la la land, with just your mind to keep you company, for an eternity.
Trog reminded me of another one. Edgar Allen Poe\'s Pit and the Pendelum. Huge sharpened pendelum swings toward a body laying directly under, and parallel to the swing. Pendelum drops an inch or so every swing, thereby slowly slicing the body. Ouch.