I remember seeing, years ago, a short film about a guy who gets stuck in a time loop and is forced to relive the same few minutes of his life over and over.
In one iteration, he talks to his smart aleck secretary. In another, he meets a woman in the park. He uses each iteration to find out more about what's going on. I think he even finds the scientist responsible for his problems. Eventually, he goes nuts and I think he kills himself.
What short film was this?