"Sneaking"

This morning I woke up a little before Davis did.  I heard him stirring, and from my bedroom, I could see him climb out of bed.  He walked to the door of his bedroom, then got down on his hands and knees.  He crawled down the hallway.  I was concerned that he wasn't feeling well because I haven't seen him crawl for a long time.  When he got close to my doorway, I asked him why he was crawling.  He said, in a very cheerful voice, "I'm sneaking!!!"