Ryan McAvoy said:
In the office when he quickly switches off the DS plans, how about he's actually watching the bit in Pulp Fiction where Jules and Vincent enter the apartment.
Almost like that's how he knows Sam Jackson has come meaning business.
Or Mace could catch him watching this Portman scene...
What would happen if Palpatine can't find the right button to switch the DS plans off? All sorts of funny and embarrassing stuff. He could just leave it on after several attempts to turn it off.