Man, great thread. As a kid i modified my Air Training Corps uniform, donned a weed sprayer and made a PK energy indicator from an old car remote control. I then went trick-or-treating. My friend dressed almost the same put a speaker in a hairdryer (with diffuser) and would 'scan' letterboxes with a loud beeping sound till the owners came out. We weren't winning any awards for realism or even quality but we made a shedload of money and treats. I think people saw us as the antidote to all the ghosts and zombies on the streets.