Killdozer! is a 1974 made for TV science-fiction horror movie, adapted from a 1944 novella by Theodore Sturgeon. A comic-book adaptation appeared the same year, in Marvel Comics Worlds Unknown #6 (April 1974).
After Conan O'Brien mentioned the movie on The Tonight Show, the movie attained cult classic status with over three million hits on YouTube within a week of its mention. The name was appropriated by the media for Marvin Heemeyer's 2004 rampage in an armored bulldozer through the town of Granby, Colorado.
(Summary from Wikipedia)