Originally posted by BlaxicanTroller
I think, actually, that Yoda is so powerful in the force that he could kind of sense what was happeneing behind him, as well as across the galaxy. Remember how they showed how everytime a Jedi got killed by the clones during order 66, they showed Yoda holding his heart, and his ears drooping?
He didn't react that way when Mace went out the window, although he did when Anakin accepted the mantle of Darth Vader. (another reason I suspect Mace could have survived) As I said before, the clones were following orders, they had no opinion or feeling about what they were doing for the Jedi to pick up on, so I think that Yoda overheard them (he did actually glance behind him out of the corner of his eye, a Force-conveyed 'message' would not require him to 'check'.