Is "Day of the Triffids" a Sci-fi or thriller?
"Day of the Triffids" is a cautionary tale and pure sci-fi at the same time. Genesis does a great musical rendition of this theme on their Nursery Cryme album--its called "Return of the Giant Hogweed".
Day of the Triffids is good SF...although it doesn't follow the excellent book very well! John Wynham had another book made into a movie. It was called the Midwich Cuckoos, which was made into Children of the Damned (made twice). I saw the original as a kid and the images from it stuck with me for some reason.
Day of the Triffids was also made into a British series which follows the book very faithfully...good to see as well...
;-)
We had it on VHS. I can't seem to find it at the moment though. hehe... just as well I suppose.