Green garden grass snakes can be dangerous, Yes, grass snakes, not rattlesnakes.
A couple in Sweetwater, Texas had a lot of potted plants, and during a recent cold spell, the wife was bringing a lot of them indoors to protect them from a possible freeze. It turned out that a little green garden grass snake was hidden in one of the plants and when it had warmed up, it slithered out and the wife saw it go under the sofa. She let out a very loud scream.