A phenomenon in which when two people make eye contact and person a blows an imaginary dart through one hand being held up to their mouth at person b. At being struck person b must fall to the ground until person c pulls the dart out of their neck. Pulling a dart out of someone's neck is the entrance to the dart game.
Tom: Why is Heather laying in the middle of the floor?
Dan: She got shot with an imaginary dart while playing the dart game.