A soldier at the Pentagon got out of the shower, and realized that his clothes were missing. And then he accidentally locked himself out of the locker room.
So now he was completely naked in the halls of the headquarters of the most powerful military organization on the planet. And he felt pretty ridiculous.
Getting an idea, he walked naked and purposefully through the corridors until he reached the Research & Development laboratory. He walked in and saluted the Head Scientist. "I am here to report the partial success of the personal invisibility device!"