Doomsday device is a term used in professional wrestling to reference a tandem move in which one wrestler hoists the opponent on their shoulders so that they are facing in the same direction in what is known as the electric chair position, while another wrestler climbs the ring post to the top turnbuckle and delivers a flying attack on the opponent.
One variation of the standard device, sometimes known as the Dudley Boyz's Dudleyville device, sees the wrestler (in this case Bubba Ray Dudley) keep hold of the opponent's legs, falling backward with them and completing a traditional electric chair drop maneuver.
Most frontal attack variants can see the grounded wrestler simply release, or, fall backward with the opponent, as in the basic doomsday device.
Unlike the previous variation, this device variant sees a headscissors throw used to pull the opponent forward off the shoulders of the other wrestler.
The flying head scissors throw performed is commonly known as a diving hurricanrana, and is where this move gets the "Rana" part of its name.