Some of these pictures and descriptions may give away plot details that you might not want to know before watching the film.
"Westworld ...where robot men and women are programmed to serve you for ...Romance ...Violence …Anything"
Two guys are taking a vacation at Westworld, a high tech theme park that lets you live like an old west cowboy. Along with bar fights, gun fights, drinking whisky, and carousing with saloon girls, shooting a rattlesnake is an essential part of any authentic western experience, as any movie cowboy can tell you, and Westworld provides its very own robot rattlesnake encounters.
One day the men ride around on some horses then sit down to rest when they see what looks like a Western Diamond-backed Rattlesnake slowly moving towards them. That's enough to scare the life out of any cowboy. They're too scared to even stand up. One of the men shoots at the snake two times but misses. It springs onto his arm fangs first. One minute the snake is sitting 20 feet away from him and the next it's dangling from his arm. (Movie snakes can always leap as if they were thrown like a spear.) I read that they used a live "milked" rattlesnake attached to his arm which was padded with leather and cotton. The snake hangs on to his sleeve as the man runs around shaking his arm to get it off. Finally he grabs it and throws it away (we see a real snake hit the ground hard.) The snake tries to crawl away but the two fake cowboys shoot at it about a dozen times before they finally kill it.
Next we see a bunch of guys in white lab coats sitting in a room full of refrigerator-sized computers with giant reels of tape. They say that the snakes are programmed never to actually bite anyone and send some guys in white jumpsuits to get it and bring it back for testing. When they get the snake into the lab it has magically turned into a different species (where is Continuity when you need them?), and in a long sequence (for a movie snake, anyway) we see them cut it open and fool around with its electronic guts and conclude that there was a failure in its logic circuits or something like that, which they say was never never supposed to happen. Little do they know that this is only the first of the technical glitches that make this move a lot of fun to watch.