Back in the '80s, I was running a vegetative transect just South of the Pease River in North Central Texas. I had two partners walking with me to record the wildlife browse and grazing plants. I unwittingly stepped on a rather large western diamondback rattler just about six inches from his head. My buddies were spooked, and one found a big sandstone rock to kill the snake. The rock was much bigger than my foot, so rather than chance the rock shattering my foot, I just stomped the head off the snake with my old mule skin right-hand cowboy boot while keeping it anchored with my left-hand boot. I may have spotted my Levi's a little bit then. I have worn snake boots in heavy cover since then.