I didn't know what they were called at the time, but I saw a carpet python feeding on a rat in my backyard when I was living in Florida. At that time, I simply knew it was a big long colorful snake. I didn't measure this particular snake, but it was at least seven feet long. I am over six feet and it was longer than I am tall and then some.
At that time, there were numerous stories about pet snakes that had escaped in the state, and they were quickly adapting to the wild. There was one story about a man who was driving his car and he saw a tree branch in the road. He stopped his car and got out to move the branch out of the road so he could drive on.
When the man grabbed what he thought was a branch it moved. The branch turned out to be a very large snake, but I don't remember what type it was.