A Bucket of Blood - 1959

Nerdy Walter Paisley (Dick Miller), a maladroit bus boy at a beatnik café who does not match with the cool scene , attempts to woo his beautiful co worker, Carla (Barboura Morris), by building a break of her. After his klutziness results in the passing of his landlady's cat, he panics and hides its body below a layer of plaster. However, when her pals and Carla enthuse over the resulting artwork, Walter decides to develop some more and bigger elaborate pieces utilizing the exact procedure that is artistic.