She Came on the Bus (1969)

A gang of horny sadistic juvenile delinquents looking for kicks invades the suburban home of a housewife injects her with dope and waylays her A passing saleswoman receives similar treatment The gang steals the housewifes car and heads for the open road They hijack a bus kill the driver when he objects and assault two female passengers one of whom enjoys it She convinces her friend to play along and they all get their kicks