Jim Talley and Terry Benner in their book True Colors tell the story of a man named Joe who decided to take an afternoon walk through the foothills just above a lake where he had been fishing. Joe was comfortably dressed in shorts, a T-shirt, and tennis shoes. Suddenly, he felt a sharp pain in his leg as he stepped over a small log. It was then he noticed a large diamondback rattler slithering into the undergrowth beside the log.

He looked down at his leg and saw that he was bleeding from two small puncture wounds in h…