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 many 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.
The husband who was taking a shower ran out into the living room naked to see what the problem was. She told him there was a snake under the sofa. He got down on the floor on his hands and knees to look for it.