To me static props are the "lead up" that lets the customers guard down when they find out it isnt real.....and then the real actor scares them. You can also use them in darker areas where people do not know if they are real or not.....every other "one" can be real or every third one and it makes the customer scared of every one and it makes it seem like there are more actors than there really are. If you walk into a room and a big jack in the box or big fake clown is in the center of the room, you will focus your attention on that "prop" waiting on something to happen, when really the actor jumps out from beside you or behind you. Walking into a room of dummies or props isnt scary, but one or two of them are real......then all of them become scary, because what is real and what isnt? Just a thought.