When I was in the USAF stationed in San Antonio, I worked in a bomb dump. munitions are stored in earth covered buildings we called "igloos." They were built for nukes back in the day, so had thick metal doors, and being earth covered, were nice and cool even in the Summer. So, we'd go out, open up the doors and I'd drive in with my diesel forklift. The exhaust would irritate the black widow spiders, who would begin dropping onto the plexiglass cockpit cover like hail. Didn't get bit often, but in the year or so I spent there, I was bit three times. Not fun.