Freakdog is a 2008 British horror film directed by Paddy Breathnach, that originally went under the title Red Mist.
The film follows seven medical students who, while out partying one night, spike the drink of an unknowing and loner hospital janitor Kenneth, nicknamed "Freakdog".
When they learn about his condition becoming fatal, one of the students (Arielle Kebbel) attempts to revive him using an experimental drug.
The result has horrible and unintended consequences, leading to Freakdog having out of body experiences that allow him to possess the students who poisoned him and abandoned him.
Although set in the United States, the film was shot on location in Belfast, Northern Ireland.