Reverse Trick-or-Treaters Do The Giving
I'm kind of glad these guys didn't show up at my house on Halloween night. It would have felt like a weird episode of the 'Twilight Zone'.
What they did was something called 'Reverse Trick-or-Treating'. Simply put, they dressed up as a two old people and brought a door along with them as a prop. After they rang the doorbell of a house, the occupant would open up to find a door staring them in the face. Most would knock and the two pranksters would then open up their traveling prop door and give candy back to the homeowners.
Most people played along with the gag, but some looked genuinely confused.