Suge Knight: My Toilet Is Possessed ... Oh Yeah, I May Have a Brain Tumor

Suge Knight's life in prison is rough ... not only does he have to deal with a toilet that flushes incessantly ... he might -- MIGHT -- have a brain tumor.

Knight's new attorney, Tom Mesereau of Michael Jackson fame, filed new docs to get Knight into better digs at the jail, for both medical and sanity reasons.