Pick something the think about that falls under animal, vegetable, mineral... and see if Darth Vader can guess it.

As he asks you for hints, he trash talks you all the way through.
(He said I had a simple mind!!!)

And when he tries to Force choke you, the whole broswer shakes.

Vader had the hardest time guessing that I was thinking of Paris Hilton's chihuahua Tinkerbell. He thought it was a Scottish Terrier. Ha!

Sheesh, some Sith Lord he turned out to be.

Try for yourself here.