This is a fun story if one doesn't think too much. Ray Milland stands in for Corman's usual suffering protagonist, Vincent Price. Milland lives with catalepsy, which makes a person appear dead, even if he is not. He lives in abject fear of being buried alive. He then builds a state of the art crypt with numerous fail-safe devices that can be employed if he finds himself in his suspended state. It seems if he could just get someone to leave him on a shelf if they think he is dead, it would work out better. Hazel Court plays his suffering wife. He is a true nut who believes his father had been buried alive, even though his sister tells him that is not so. The thing is that there are so many things that happen, as we reach a conclusion, that require some big time suspension of disbelief. Still, it's quite entertaining watching Milland being dragged down by his fears.
Review of The Premature Burial
