Usually have a very uncomfortable smile on my face while staring at the cake so I don't make eye contact with the "happy birthday" singers! But even more awkward. SINGING happy birthday to someone. "um excuse, what key are we singing in?
to me this reads as if one is making faces to a stanger's baby when the stranger's parents arent looking. so this would only work if the baby's grandparents are present and not looking at the one making faces.