Parker: (from his bedroom) You have to come in here.
Me: (going in his room after ignoring him for several minutes) What?
Parker: My head is making a funny noise, listen. (start slapping himself on his head)
Parker: See it's going "bong bong bong bong." I don't like it making that noise.
Me: Then stopping hitting yourself on the head.
Parker: But I like doing that.
Me: Go to sleep.
**FOLLOW UP: This morning hit woke up and tested hitting his head for the noise and said it was gone. . . that's when it hit me, he had water in his ear from his bath. Mystery solved.