Also known as The You're Not Funny Paradox wnd Shut The Hell Up Paradox.
When a person tells a joke and no one laughs than the person feels awkward in the silence, they also feel the need to fill the silence with another joke but they are not funny so no one laughs again.
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.