What do you think is the worst corpse run in World of Warcraft? Man they can be a pain the ass! Anyway here's the top 5 mentioned so far...

1. Blackwing Lair, Molten Core, UBRS, LBRS, or BRD. Not a long run, but probably the run everyone's done the most -- and we've all fallen into the giant pit in the middle and made 39 other people wait for us at some time.
2. Razorfen Downs or Razorfen Kraul. Set yourself on autorun and get a cup of coffee.
3. Coilfang Reservoir, particularly for Alliance. Am I the only person who can never see where they're going in the tunnel in ghost form?
4. Getting back to C'thun before they added a teleport near the beginning of AQ40.

• All npcs/mobs disappear, you cannot perform any actions apart from move, you cannot zone into instances, you cannot drown.
• Other players will still see you move and be able to kill you but your corpse will keep moving, on your screen you are still alive.
• If you have been killed you will die at the spot where you changed the download rate back to normal, not where they killed you, hence "corpse walking".
• NPCs/Computer mobs cannot harm you.
• You get disconnected after 3-4minutes, but if you reset WoW's download rate back to normal you will not.