|Finn watches in terror as the apparatus used to harness his thoughts is applied to his head|
|Introduced in||"Power Animal"|
The brain machine was a device created and used by the Gnomes in the episode, "Power Animal." It was made to harness the energy from a person's thoughts in order to charge the Upturnoverdrive. Finn was the subject used to do this because of his dynamic energy. The machine was destroyed when Jake fell into the Beneathaverse.