@pleonasm - I love these kinds of stories. My father used to be an expert on convincing people about these sorts of things. He particularly liked telling people about "drop bears" which lived in whatever part of the world the person happened to be visiting.
According to dad, they lived in the trees and would drop on people who weren't constantly vigilant.
I think the only thing that disappointed dad was that he usually wasn't there to see his friends peering nervously above their heads the whole time they were overseas.