Here's a great comedy short that you've got to check out called The Promise. The movie has a very simple set up but it works perfectly. It shows you what you can do with solid writing and acting.
The whole story takes place in a parking garage with two friends. One of them uses the opportunity to fulfill a promise he made to his friend five years earlier. I won't say exactly what the promise is (the pic above is a good hint though) because it's just one of those things best experienced while watching the film.
The Promise was directed by Sam Molleur who also co-wrote the script with Curt Neill and Elisha Yaffe. I loved this short. Even though it was a simple concept it was executed well and was extremely entertaining. I think you'll enjoy it!