When somebody tries to pick out of a crowd who farted by calling doorknob and watching who flinches or rushes towards the door. The person who was successfully doorknobbed is beat
to the ground by the
doorknobber and surrounding friends. This method is very
effective when one has a good idea who let loose the stink.
When Bob notices the smell of fart
in the room, he suspects Jim. Bob calls doorknob at Jim while running at him with fist in air hoping that Jim
will rush towards
the doorknob thereby validating Bob's pummeling of Jim. The doorknobbing goes horribly wrong when Jim, who hadn't farted, bitches the whole night about the bruises on his arm, while Bob looks like a dick.