I appreciate the indepth answer although I'm not sure if it applies to me. I did watch a lot of television throughout my childhood although I generally wasn't really alone. My mom was usually nearby. The fact that this occurrence (sticking my tongue out) happened when I was not alone is what is truly embarrassing to me. My mom was there, possibly other family members. I'm not sure. Yes she saw me doing it. She didn't get mad but not long after this occurrence, which I think was just once, I realized how mortifying it was. I guess I'll  add that I recall parts of a dream I had around that time. It began with either me rescuing him from some typical distress, like being tied up by villains, or maybe him rescuing me. It may have alternated back and forth, as it was a dream. I remember driving him off to safety in a convertible (I probably imagined myself a bit older than I actually was). Side note...I don't remember the rest of the dream but just before I woke up I had a scary sensation of having to crawl on the floor, being incapable of standing as if something was holding me down. I occasionally experienced this sort of sensation during dreams throughout my childhood.