Realm of Insanity

The dream opens up in a night, desert type scene. There are brown buildings around. I'm being shown around by a man. He is telling me about the police force. The scene than switches and I am in a building and a teacher is teaching me how to use a sword. The scene switches again and I'm in a bathroom stall when two people peek over the top and we start talking. The scene switches for the final time and I am walking with a whole group of people behind the tour guide from before. We are all wearing the town's police uniform. I look over to my left and moving across the ground is a green snake.
"Snake!" I scream.
After these words we all run away, yelling and screaming.