Scary Charlie

It's just me and Charlie awake now that Joseph is at school. After Joseph got on the bus, we came inside. I walked down the hallway to tell Mitchell something, even though he was mostly asleep. It's pretty dark, quiet, and cozy in the house right now. As I walked back down the hallway to find Charlie, he jumped out behind me from the hallway bathroom and yelled. I screamed and laughed at the same time. How is this little guy old enough to know how to scare people?