Curses! Foiled Again!
The strange alien spacecraft rocked and bucked and spilled the strange alien captain onto the gray alloy floor. He emitted strange alien expletives as his underlings hid from his wrath. Yet again, the captain had aimed the death beam at one of the Earth's rural inhabitants, and yet again the shiny, reflective lining of the Earthman's traditional headgear aimed it straight back at him. The aliens gave up. Earth could not be conquered.
The Earthling waved in triumphant farewell, his baseball cap's aluminum lining catching the sun's rays, the brightness making the aliens wince. "Curses!" the captain shouted. "Foiled again!"
This story was performed on The Drabblecast, Episode 191.