See post 7.
ETA: My lame attempt at humor.
Does anybody know the circumstances? i can’t imagine how this incident took place-what-the guy was showing off to a snake?? 
One eyed trouser snake?
I saw a movie (z grade ) many years ago along the same theme as the earlier jokes about “You’re going to die”. The Lone Ranger got bitten on the end of his equipment by a rattle snake and Tonto refused to suck the poison out. That was a terrible movie.
ralph, considering that the site of the incident was a roadside toilet stop, I imagine the snake was in the toilet, and bite something that invaded its space, so to speak. (Assuming there was a formal toilet - if there wasn’t, the guy may have been pissing on a tree, with similar results.)
I’d reserve “lucky” for if the snake had been a constrictor.