Bahamut.Lolserj said:
also if they were blind and only followed sound and you set up a loudspeaker that was surrounded by C4 could you kill a lot of zombies?
It was mentioned before by a few people, the whole leading them to a cliff or ledge you're on the other side of, and let gravity do the work.
I find that a very good way to kill them. Minimal energy and effort, moderate efficiency.