Smith's variations on the "power pose" were pretty comical. Every time he struck a pose, lightning flashed.

[yuh huh]

And why didn't they explain his increase in powers? All of a sudden he starts flying. Like I said before about the second film, I believe the Oracle activates powers in gradual amounts. She gave Neo stuff to eat all the time, and he kept getting more powerful. Smith absorbed her, and got all of it immediately.

That's my take on it. But I don't wanna make my own assumptions. They should've answered everything, no matter if it made the film 20-30 minutes longer.