On a nature hike, as a rule, the dangers you want to guard against are dehydration, getting lost, and bears. But of all of nature's creatures, the most terrifying might be a duo of teenage boys without much to do. In Utah, two such young men were arrested on suspicion of setting up trap that consisted of "a 20-pound spiked boulder … rigged to swing at head-level with just a trip of a thin wire -- a military-like booby trap set on a popular canyon trail," according to the Associated Press.
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