I have a full size Storm Trooper helmet you can borrow (Star Wars)

last time I used it was to scare off the Jehovah's Witnesses that came one Saturday morning....

I opened the door and before they could speak said:

"your late....Lord Vader will be most annoyed by your lack of effort....report immediately to your fighters and prepare for the assault on the Rebel stronghold!"

they left so fast they didnt even leave a complimentary copy of the Watchtower.............