My Bloody Valentine ★★★★½

This movie rules. Probably the greatest slasher film of all time. 
If Robbie Robertson, the cast of SCTV, the first and last hour of The Deer Hunter, and the best twenty mins of Friday the 13th parts 1-4 fucked each other and a baby was produced then transferred to film, it would have looked and sounded like this film. 

P.S. this is the most Canadian movie ever filmed.