I've had a few startling episodes with snakes, to start off with I don't like snakes, if I see one several feet away I can deal with them with no issues.
Once when out in Idaho while shoveling out an irrigation ditch on a steep bank with a round pointed shovel tossing the dirt up on the high side I tossed a shovel full up on a rattler, he buzzed, I jumped and the shovel did a good job dicing the snake up.
Out hunting one day and climbing up a rock ledge all of a sudden I could smell a disgusting smell looked down in a good sized crack in the ledge and it was full of a mass of copper heads. Came back a couple of days latter and eradicated them.
A few times over the years keeping a plow truck just for plowing and sanding in the winter, they were parked all summer long. Tried all the different methods of keeping the mice out, dryer sheets, peppermint oils all the common ideas including decon and such. It seemed like every two or three years when I would get the trucks started for the first time in the fall a garter snake or two would come slithering out. One year plowing for the first time with the heater working and the windows down for fresh air, plowing away back and forth and all of a sudden about a 2 foot long snake wrapped around and climbing up my leg, never did figure out just how I got out of the truck that morning without crashing it.