If you live where tarantulas do, it's possible (but not terribly likely) you could be stung by one of these wasps.

"It’s actually a kind of solitary wasp with a sting whose resulting pain only lasts three minutes, but it’s so fiercely electric that it could only be described as totally unacceptable. "There are some vivid descriptions of people getting stung by these things,” says invertebrate biologist Ben Hutchins of Texas Parks and Wildlife, “and their recommendation—and this was actually in a peer-reviewed journal—was to just lie down and start screaming, because few if any people could maintain verbal and physical coordination after getting stung by one of these wasps. You're likely to just run off and hurt yourself. So just lie down and start yelling.""

Tarantula Hawk