The awkward fumbling after greeting who is usually a distant relative. Neither party is sure whether to hug or shake hands, and so the dance begins, wherein both parties seem to do a sped-up version of the robot, first extending an open hand, then switching to open arms, with the other party doing the opposite.
Usually, this occurs with an in-law, but in some cases a
drunkle is involved.
This always results in awkwardness, embarrassment, and comedy.