When I was a kid, I was a huge Ghostbusters fan (still kinda am, actually...). One year, I wore an oversized matching blue sweater and pants (so I could layer underneath, it was always too cold ...probably still had to wear a coat over it ). I made a proton pack out of aluminum foil and old cereal boxes, and attached a toy neutrino wand with some rope. Um, yeah... so, I tried to recreate that...
This ominous kid stops by your house on halloween. He doesn't speak, and he doesn't accept any candy. If anything, it appears he is waiting for you to invite him in.