Leia uses a gravitational field disruptor to increase the mass of a Rigellian assassin.

Gravitational field disruptors were common devices found in many stores, and were commonly used by merchants and transport operators to temporarily alter the gravity surrounding a specific object. The dedicated field created by the disruptor can be set to allow heavy loads to moved about with ease. They can also be modified to work in reverse, causing an object to suddenly become much heavier.

Princess Leia Organa used one of these devices to increase Darth Vader's porter's mass to the seventh power, causing him to plunge into a deep hole made by his own mass.