Munchkin: Tuba of charm loot
You draw only one treasure total if you manage to flee a battle with multiple monsters.

This question came up in the SJG-forum and was answered by one of the Munchkin editors:


  I'll admit that the wording is unclear, but the INTENT was that you got one Treasure as you fled the combat, no matter how many monsters you fought.


See: http://forums.sjgames.com/showthread.php?t=75522