Quote Originally Posted by Malbordeus View Post
a bridge over an underground river with a large log on ropes attached to the ceiling above it. the log is hoisted (via the 100 goblins) to a ledge where a couple of the little greenies hide behind it (taking shifts to keep their cave secure) ready to push it off when the tank gets to the middle.
also, given a 20ft bridge, and a 15-20ft tree being swung, you can nerf eveyone on the bridge. the river underneath it doesnt have to be deadly, but making it evaccuate outside the mountain into a lake is funny.

just remember tree damage when it hits, probably a high bull-rush, or maybe a reflex save to not get spammed off the bridge.

pit with greased sides... doesnt need to be intended as a trap, could be a latrine...
If your goblins are industrious enough, there could be wooden stakes embedded in the log, as well.