After you right click on Ebenezer Rustlocke's corpse, dwarves are supposed to spawn and chase you out. On Nostalrius, nothing spawns.
Source: http://www.wowhead.com/quest=631/the-th ... n#comments
First comment (By Minthus patch 1.12.1):
"As soon as you click it, Dwarves will spawn and chase you out."
