Happy Volts caters to the mentally ill residents of Bullworth, as stated by its sign ("Home for the Mentally Unwell") which may include the Townies Otto Tyler, Leon and Clint (aka Henry), who Jimmy helps return to the asylum. During the course of the game, the English teacher Mr. Galloway, and Greaser leader Johnny Vincent are admitted into the asylum, only to escape with help from Jimmy. And during the missions, Fenwick can also be seen on grounds. It is also rumored that Gary Smith was admitted into the asylum.

The building is divided into three blocks A, B, and C, Block B being reserved for patients who have violent tendencies. At first glance it may seem that only A and B block can be accessed, as only those two have the icon indicating that the door can be opened. However, the door to C Block can be broken down through punches, jumping against it, or weapons. Blocks A and B are in active use, but C Block is run down and decrepit. There is a mortuary located inside C block, along with what appears to be operating tables and a X-ray viewer depicting x-rays of humans with physical defects. If Jimmy regularly visits Block C he may encounter a door marked with EMPLOYEES ONLY with a green arrow under it, which is normally locked. If Jimmy opens this door, he will enter a fenced-off area. He will not be able to return to the building, and will have to wait till 2 am. Alternatively, Jimmy can use a weapon to hit an orderly though the fence, then he will be busted through the wall and then brought to Blue Skies Industrial Park police station. (Jimmy must be close up to the fence otherwise the orderlies won't spot him.)

During free roam, not a single patient is seen in the cells, though they can be heard screaming. The asylum is patrolled by the Orderlies, who wear white uniforms and look for trespassers. This interior is the most interactable in the entire game. If Jimmy wears the Black Ninja Outfit or Orderly Uniform he can explore the asylum without getting in trouble for trespassing.

Happy Volts caters to the mentally ill residents of Bullworth, as stated by its sign ("Home for the Mentally Unwell") which may include the Townies Otto Tyler, Leon and Clint (aka Henry), who Jimmy helps return to the asylum. During the course of the game, the English teacher Mr. Galloway, and Greaser leader Johnny Vincent are admitted into the asylum, only to escape with help from Jimmy. And during the missions, Fenwick can also be seen on grounds. It is also rumored that Gary Smith was admitted into the asylum.

The building is divided into three blocks A, B, and C, Block B being reserved for patients who have violent tendencies. At first glance it may seem that only A and B block can be accessed, as only those two have the icon indicating that the door can be opened. However, the door to C Block can be broken down through punches, jumping against it, or weapons. Blocks A and B are in active use, but C Block is run down and decrepit. There is a mortuary located inside C block, along with what appears to be operating tables and a X-ray viewer depicting x-rays of humans with physical defects. If Jimmy regularly visits Block C he may encounter a door marked with EMPLOYEES ONLY with a green arrow under it, which is normally locked. If Jimmy opens this door, he will enter a fenced-off area. He will not be able to return to the building, and will have to wait till 2 am. Alternatively, Jimmy can use a weapon to hit an orderly though the fence, then he will be busted through the wall and then brought to Blue Skies Industrial Park police station. (Jimmy must be close up to the fence otherwise the orderlies won't spot him.)

During free roam, not a single patient is seen in the cells, though they can be heard screaming. The asylum is patrolled by the Orderlies, who wear white uniforms and look for trespassers. This interior is the most interactable in the entire game. If Jimmy wears the Black Ninja Outfit or Orderly Uniform he can explore the asylum without getting in trouble for trespassing.

The Hobo is a veteran of the Korean War. While in Korea he saw combat regularly, and lost most of his platoon in a friendly fire incident. It's unknown how he first came to Bullworth Academy, but he currently lives in a fenced in yard behind a broken down school bus on the school grounds. He is an alcoholic and spends much of his time either drunk or looking for a way to get drunk. He occasionally has flashbacks to the war, and may suffer from Post-Traumatic Stress Disorder. He is also collecting radio transistors with a great urgency, claiming he needs them to finish a device he's building before it's too late.

At an unknown point in time the Hobo was a member of the Bullworth faculty. He occasionally says he should go back to teaching, and calls Dr. Crabblesnitch a spineless weasel. The nerds mention that he was a former teacher in smalltalk. Miss Danvers occasionally announces over the PA system that "contrary to rumor, the old drunk by the school bus is not a former teacher at Bullworth". The exact nature of the Hobo's relationship to the school and its staff is unknown, however.

The Hobo's last name is Grant. One of the townswomen has a line of dialogue that states about a Mr. Grant and the Korean War, and in fact the game's data files list his name as Mr. Grant. It is vaguely hinted by putting various lines of dialogue together that Mr. Hattrick was responsible for the friendly fire incident in Korea. Another reference to Mr. Grant is Miss Kopke saying that she heard "that Mr. Grant was once a star of the Scottish stage", an allusion to his voice actor's theater career. Moreover, Mihailovich claims that Mr. Grant may have been the mayor of Bullworth at some point.