In writer-director Alexandre Aja’s terrifying international breakthrough, two friends on holiday for a quiet weekend at a secluded French farmhouse instead find horrific violence and extreme brutality when a killer (I Stand Alone’s Philippe Nahon) comes calling. Rivers of blood from Giannetto De Rossi, one of Lucio Fulci’s go-to goremeisters, push the boundaries for perhaps the hardest R for violence the MPAA has ever awarded, while Aja’s stylish set pieces and breathless pacing make High Tension one of the most notorious slashers of the 2000s boom.