The corpse hits the ground with a bang as Norani fires his bow, missing as the undead's position shifts. Marcus and Heamor ready their weapons, as there is no way to attack the thing without stepping into the slippery grease that Liev has summoned.
However, the prone corpse is the least of their problems. As it slips, its mass sends the rest of the jar toppling back into the jar behind it, which promptly tips back, and bumps into the jar behind it, which topples into the jar beside it, which...
Meanwhile, the thing's arms topple the jar on its left, which falls into the jar beside it, which...., while its legs unbalance the the jar on its right, which...
The group now stands in a room with 16 active, very angry walking corpses. On the good side, they seem to be very slow. Also, two jars haven't broken open yet. And Heamor's right by the door. On the bad side...well, that would be obvious, wouldn't it?