While exploring up in the mountains near Silithus I happened upon a rather large hole that appeared to have no bottom. When I jumped into the hole I found the bottom but it was quite far down. So I came up with an idea for a funny prank.
1. Find several guillible people.
2. Follow the instructions of this video (although you don't really need to get the waterwalk pots) until 2:10, then use some slowfall to jump off the cliff to your right. [ame=http://www.youtube.com/watch?v=S9jfj9VImZk]YouTube - Spazzymcgee and hornett wow aq glitch[/ame]
3. Once you are safely on the ground, continue forward until you come to another cliff that leads into Ungoro Crater.
4. Go left along the ledge of this cliff and you should eventually find 2 small holes that you can't see the bottom of.
5. (essential) Convince whoever you take along to delete their hearthstones. I used the excuse that it would zone you to your hearthed location if you didn't delete it.
6. Tell the person/people that the hole has a portal to hyjal at the bottom of it or something, and then make them jump in with some slowfall (don't activate the slowfall as soon as you jump, use it when you start to see the bottom)
Without a hearthstone, they can only get out through the help of a GM! (Don't take along mages/DKs, the bastards just make a portal)
The people I took down spent 3 hours in this hole before finally getting in contact with a GM, and another 10 minutes ontop of that while they explained how they got there.