Black Widow Spiders can get pretty big and their bite puts some people in the hospital. I get bit at least once a year - for me, its like having heat stroke. Then the donut bruise forms around the fang marks...(that's when I figure it out).
Daughter #1 had one on the front of her house - it was high up so she sprayed it with hornet spray. A couple hours later, Daughter #2 (the peppermint hater) came by on her way home. She said a big black spider fell out of the sky and landed at her feet.
Daughter #2 is terrified of Camel Spiders. Apparently, people are finding them in Las Vegas. Las Vegas is a 10 hour drive south of Reno but Daughter #2 is pretty worried about them.