Spider
Here's a great short film from 2007.  It's earned a slew of film festival awards and a high rating on the IMDb, but it's virtually unknown, for no better reason than that there isn't a commercial delivery system for short films anymore.  I love it because in the span of just nine minutes, it manages to cover a wider range of emotions than most full features do.  For that matter, it tells a more complete story than many do, too.  Shorts like this demonstrate just how much you can do with so little.
  
http://www.youtube.com/watch?v=hgYykXgwl20
 
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