A lady here in Arizona was bitten by a rattlesnake, and she mistakenly thought that she had to catch it and take it in for analysis (maybe she was thinking of rabid mammals). It unhinged its jaw and bit her several times on the hand. The TV news showed her hand, and it was all swelled up and looked bruised and very painful. Lesson to be learned - don't mess with rattlesnakes. You would think that would be obvious, but some people are incapable of learning.
One day, walking up the hill to work, Jones cam across a large rattler. Facinated, he managed to catch the snake and put it safely in his lunch bucket. That day, at lunch when all the mechanics were lying about in the x-cut, Jones opened his lunch bucket to play with his new pet only to find an empty container. Upset, Jones loudly started asking, "Who stole my snake?" The drift cleared out immediatly and Jones got the name of Rattlesnake Jones for the remainder of his life.
I "mess" with rattlers all the time. Usually with a .410 but sometimes a 12 guage.
She might've gotten that idea from a TV show. The anti-venom you need can be different for different types of venomous snakes.