This movie, from the 1940's I'm pretty sure, begins when a man and a woman (or maybe it was just him) in an apartment begin to succumb to the fumes from the gas stove that he just turned on. The rest of the movie is all about the incredible experiences that happen while he(or they)are in the process of "dying". The movie ends with him / or them regaining consciousness as the gas fumes subside somehow.
Tags: Help, Identify, Movie, Please