whatever he said, he expressed joy that obiwan was able to get through the droids and fight dooku...which makes no sense to me...shouldnt he have been hoping for obiwan to be struck down, so that he could not influence anakin during the duel, and keep him from killing an unarmed man? shouldnt he have made that disappointed squinty face when obiwan cut down the droids and jumped for joy when obiwan was knocked out?
or he wanted to seem like a greatful prisoner being rescued? if he just sat there and gave them an analytical stare, or a sidious typle look it would kind of throw the fact that hes supposed to have been kidnapped, be completly helpless, and relying on anakin and abi wan as his only hope. plus it would help give anakin the illusion that palpatine actually cared about him. sitting in a chair with no concern doesnt seem like the right responce for a politition whos supposedly seen to real action in his life.
That's true. He would have looked like a total prick if he just sat there watching on with his kindly Chancellor face, and totally misbelieving to the Pair if he put his Sidious face on.
But letting out that sudden, low-toned, "Get him," seemed that he was cheering on the Jedi and booing Dooku, which is what Chancellor Palpatine should be doing after all.
I think the "Yeah" Palpatine quietly yelled out was there only for comedic purposes. But now that i think about it, it could've been taken that way or i could've been taken seriously. How his "Yeah" should've been taken, by Lucas standards, i dunno..i thought it was a tad humerous watching it for the 1st time in theatres on opening hour.