Decent
The Good:
Artwork is good, better than anything I could produce. However I'd add some color, even if its just solid like the image of the can. The humor is decent but could use work on the delivery.
The Bad:
The voices weren't always clear. I couldn't understand what the guy was saying after he introduced the drink something like "you know nun-uh-nah ***** ***** **** ******* ***** CHEST BOOM' I think it was just a bit quiet. My guess is that he's imitating what your heart does and he's not really saying words.
At the very least put a stop at the end of the movie. Easiest way is to make the last frame a key frame and open up actionscript and type 'stop' (without quotes). Though since this was done in QuickTime and converted, the movie is probably embedded and thus a little more complicated. (guessing at this though)
The image of the can goes by way too fast, though I suppose that's inline with what the can actually does. I took the time to view your site and found the quicktime version which pauses at the end to let you inspect the can. The flash version would be much better if it did this.
The Vote:
2 - While I got the humor, it didn't make me chuckle. However, I think it may have been that I was preoccupied with hearing what was said.