The act of holding a door open for someone approaching but not super close, thus causing the person to guiltily rush to the door. It's not necessarily an act of kindness, but perhaps an act of selfishness, as a doordick attempts to redeem him(her)self by the precariously selfless act.
when you're holding up your phone and making faces at it, as though you are taking a selfie, but you're really taking a picture of the person across from you or the wall or anything else that seems interesting but you don't want to be caught dead taking a picture of.
This action is often made more convincing by wiggling the eyebrows or opening the mouth, to pretend you're trying to get a Snapchat filter to work.