To promote the newly-opened Star Tours at Disneyland, Darth Vader himself came to check it out. The problem? It wasn't quiiiiite ready. What's a Sith Lord to do? Explore the park, obviously.
You can also see lots of sweet extended cuts:
Darth at the Sword in the Stone
Darth watches a parade
Darth on the tea cups
Darth walks through Sleeping Beauty Castle
Darth at a dance party
Link via Disney Parks Blog