Had a rattler strike my work boot in Wyoming. Being from a snake free zone, I never expected it. The buzz didn't register, and I never gave snakes in the warm iron pile any thought.
Kinda felt like I hit my foot with a stick. Just a quick thump.
Little guy, maybe 18" long. No penetration near as I can tell.

They still aren't typically on my radar.
Hornets, now that's another matter entirely.

Out there doing it best I can.