Star Wars: 10 Obscure Movie Secrets That Took Years To Discover

RD-2D is surely the most popular droid in all of history. We never understand what he's saying, but the reaction characters have to his series of boops and beeps have made him notorious as a lovable sass-bot. We've seen him get our main protagonists out of a number of tough situations; whenever there's a a garbage shoot that needs unlocking, or a difficult flight manoeuvre to perform, R2's the one to save the day.

During the prequels, the animators had fun adding other character nuances to the R2-unit, many of which went unnoticed for some time. When you've got Ewan McGregor and Hayden Christensen going all samurai on a bunch of droids, its easy to not pay attention to the antics of a rather unassuming little robot. But if you play close attention to R2 in Revenge of the Sith, he's one feisty little trash can.

During the rescue of Palpatine, General Grievous escapes, leaving Obi-Wan and Anakin to dish out some lightsaber justice on the remaining droids. If you watch closely you can also see R2-D2 lending a hand by tripping an unfortunate droid as he tries to flee.

The moment in question happens at 3:00 in the below clip.