NB You may be asked to produce proof of age ID.

The original slasher movie. On hearing that her grandfather's grave may have been vandalised, Sally and her friends set out to investigate. Stopping off at the family's old farmhouse, they discover their neighbours are the chainsaw wielding Leatherface and his blood-hungry family. One hour and 33 minutes of tension, unrelenting terror, and the hellish inevitability of a violent death. 

"A despicable film ... a degrading, senseless, misuse of film and time". LA Times

This is an 18 certificate film. If you look under 18, you may be asked to provide ID. Yes it was made in the 1970s but it's still terrifying.