Jim Gordon has the bat-signal to call Batman, but what does Darth Vader use to call on his Stormtrooper henchmen? Probably this Star Wars Stormtrooper Porch Light Cover. Just place this on your porch light and turn the light on.
"If you give a man a wookiee, he's going to ask for a fast spaceship. When you give him the spaceship, he'll probably ask you for an astromech droid to help with repairs. Once you've reached light speed, he'll ask you for an Alderaan princess.