When someone gets a bruise on their elbow, but insists on going to a doctor because they are scared it may be something as serious as cancer or gangrene
Alex fell and hit his elbow while trying to retrieve a football, and that elbowlina decided to go see a doctor
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.