The Force push is a nice idea Bob, and it looked pretty good in your mock up. As others have pointed out, there is the inconsistency with Anakin's robe.

I also agree that Anakin pushing Mace out of the window would be taking it the situation a bit too far. At that point, Anakin is only trying to stop Mace, he wants Palpatine arrested, not dead. If Anakin pushes Mace out of the window, he just flat out murdered him.

Some already mentioned that they felt it was already too much for Anakin to chop off Mace's hand. So how is this for a solution: one of the posters here (Davnes or SSWR if I remember correctly) made a mock up off the scene where Anakin blocks Mace's saber right in front of Palpatine's face, just like how Vader blocks Luke's saber when he swings at the Palpatine in ROTJ. In the mock up, Palpatine uses Mace being distracted and blasts him out of the window.