Smooth
This gets a full 10 out of 10, its a great animation, the flash skill is evident, the subtle humor is brilliant and the building swear words is awesome. My favorite part in the entire animation is that 3 second pause, when the waitress is like O_O and the blue brother just goes... "fair enough" I laugh every time.
I Love the facial expressions, they work beautifully with the dialogue. And the subtle gestures are very realistic.
Only thing I noticed as a slight flaw is that in while in the car, there are a few points where the red brother says "big" or "pancakes" where its evident that he's using a microphone because there is a slight -pah- like when you exhale onto the microphone.
I'm a perfectionist, but this piece, was amazing, I laugh every time.