Snake from the Dead

We were leaving a hospital through the emergency room, all of a sudden my co-worker looks down and sees a snake on the ground of the ambulance bay. It's probably 3 feet long. I take a closer look and realize that someone has chopped or beat the snake's head off. Making it dead. I tell my co-workers. Nevertheless, when the security guard walks outside:

Co-worker: "That thing ain't alive, is it?

Security Guard: "The only way he's alive is if he's possessed. And y'all, if that things possessed, y'all are on your own."