The original song title is Cows with Guns, and I first heard it a few years back on Dr. Demento's radio show. I even used the name for one of my fantasy football teams last year, complete with logo. I even started a thread with a link to the mp3 some time ago, but it didn't get much of a response.
First time I see it with this flash animation, and they did a nice job.
That song has a perfect ending.