Halloween Glow in the Dark Maxi Poster: Be careful when you turn off the lights as this spooky glow in the dark poster is guaranteed to give your family and friends a frightful night! When the lights are still on, a Frankenstein monster looks a little ghoulish but when the light go down, his face turns green as the lightning strikes around him, the trees blow in the wind and he asks you ... 'Trick or Treat'? Which would you prefer? This glow in the dark poster will ensure a night of spooky fun and is guaranteed to have you hiding behind cushions and in cupboards by the end of the night. Just make sure you don't turn out the light!