I was just on a call with a colleague in Amsterdam and, when saying goodbye and hanging up, realized that I actually waved at the phone for some reason. Must have been reflex or something. Have you ever done that? I also catch myself using my hands when explaining something over the phone, which is obviously pointless to the person on the other end. My kids also did this when they were 2-ish years old, trying to show pictures or things to whomever was on the other end of the phone. Of course, I don't have the excuse of being a toddler!