like several previous commentator i would love this little gem to get an airing on tv . i saw it a a supporting feature . in 1974 we be in the dying day of double feature in the uk . i think the main feature that day be electra glide in blue . anyway and i fondly recall this a a very effective thriller . it certainly convey claustrophobia and menace . it would be great to have an opportunity to re appraise this film .