The trick thing, I don't understand
what do you mean?
You know the saying, "trick or treat"?
well they have you spin the sign, treat, you get prize, but if you get trick
they do a trick to you like make you all grey colored, make your head invisible, or make your head backwards (from what I've seen so far)
like they played a trick on you!
Then stay in the room and they keep "randomly" picking people until someone spins and gets treat! (: