Cujo - Teaser Trailer (HD) (1983)

In rural Maine, Vic (Daniel Hugh-Kelly) and Donna (Dee Wallace) Trenton struggle to repair their crumbling marriage, while their young son Tad (Danny Pintauro) befriends a hulking, lovable, 200-pound St. Bernard named Cujo. With Vic away on business, Donna and Tad take their decrepit car to be fixed at the remote farm of their mechanic (Ed Lauter). As their aging Pinto sputters to a stop and dies, Cujo appears. But the once docile dog has undergone a hideous transformation - and becomes a slavering, demonic, implacable killer possessed by almost supernatural strength... and unholy cunning.

[megamcdonald]

Very scary trailer, but I think the movies not scary