On the way home from work, I saw a woman walking a very large dog by the side of the road. For just a split second, from my angle, it did not look like a dog at all. It looked exactly like a Muppet. So I had this crazy momentary panic reaction, that went like this (imagine a Dave Chapelle voice here): "Aaah! That's a Muppet! Muppets are real! What's going on!? Aaah!"
Then the dog turned, and I saw that it was just the most unrealistic-looking actual dog I've ever seen.