I wouldn't go this far, but this is pretty cool :) >>> Harry Potter-inspired potions chandelier. When I'm a "grown-up" and have a house with my big sci-fi/fantasy display room, this is going to hang from the ceiling.
Spray cheap halloween masks with glow in the dark spray and watch your haunted house light up where ever you put them. Leave them in large groups or use only one or two. Either way it's cheap and CREEEEEEPY