It takes guts to start your movie off with a misspelled title, but that's exactly what Lucio Fulci did in this movie, which has long held a spot on my "favorite bad movies" list.
The plot is fairly straightforward-- it's essentially an Italian version of Carrie, which means that it involves a hot woman joining a dance school and being possessed by a vegetative catfishing victim and using telepathic powers to do random violent bullshit (much more random than the violent bullshit of the American Carrie). You'd think that any school in the US with a publicized incident involving a gym teacher seducing and maiming a student would run into legal problems, but that does not come up in this film. Come to think of it, everyone assumes it’s kinda normal when the possessed high school student starts an affair with a doctor who is clearly in his 40s. Maybe the Italians are just an oblivious bunch.
But I digress. The awesomeness of this movie does not come from the plot (again, it is an Italian movie), but from the randomness factor.
Some horror movies have people in gyms being murdered with tanning beds*. This one has a gym murder involving laser eyes and an evil clone.
Some horror movies have girls murdered with chainsaws. This one has a girl murdered by ninja snails who hide on Ziggy Stardust and Rocky Balboa posters before they strike.
Some movies give New Orleans residents appropriate accents. This one gives the Cajun woman a fancy British accent.
Some movies have characters that don't annoy me. This one has Tom. Jump off a cliff, Tom!
Some horror movies don't have Heracles punching college students in museums. This is not one of them.
*Hey, it's a thing! I think it happened in Death Spa AND Killer Workout! Look, it's not easy to come up with a parallel for every gahdam situation in every gahdam movie. You try thinking up the standard cause of death in horror movie gyms!
