Two Bad Mice (1999)

Kay takes too much cocaine and breaks apart. Literally. He becomes two people, one black, the other white. Not only this but his hallucinations of a demonic priest and lascivious nun have punched into his reality. In order to destroy the nightmare he goes in search of a gun, but on the way meets his friend Michelle who accidentally kills her husband. Kay helps Michelle to get rid of the body and in the process they fall in love.