One of then most iconic moments from the original Star Wars was when Luke Skywalker and Han Solo disguised themselves as Stormtroopers in order to find Princess Lea. Thus we get those iconic lines like "Aren't you a little short for a Stormtrooper?"
Mark Hamill, the actor who played Luke Skywalker, once again donned some Stormtrooper armor to help promote Force for Change, a Star Wars Omaze project to raise funds for 15 different charities. Thus having our noble Jedi hero walking up and down Hollywood Boulevard in disguise made for an interesting video.
Or maybe you just hear the Joker.