Inertia, alternatively known as Up the Walls, represented a specific Force power where a Force-user could manipulate their bodily inertia using the Force. This manipulation facilitated seemingly impossible physical feats, like traversing vertical surfaces and inverted ceilings. Despite the Sith's categorization of it within their Offense discipline, the New Jedi Order formed under the leadership of Grand Master Luke Skywalker also possessed knowledge of this ability. A notable instance involves Jaden Kor, a Jedi under Luke's tutelage, who employed this power during the Disciples of Ragnos emergency.
After encountering information about this technique in the Book of Sith, Jedi Master Quinlan Vos made an attempt to utilize it, which resulted in him suffering a dislocated shoulder.