Peek-a-boo?

Jack has made up his own version of peek-a-boo. Yeah, he plays the traditional "blanket over the face" version, but he seems to prefer his own way. He sticks his head and half his upper body into the cubby of my night stand and waits for me to say "where's Jack?" After that's said he gets very excited and pops out. At this point I'm suppose to say, "there you are!" Then he waits for me to say "can you do it again?" Then we replay the whole event.