I just saw this video on the Travel Channel and found the video clip on Youtube.
Go to min 3:15
They control of their props manually while watching night cams.
I think next year I am going to trash all of my motion detectors and go this direction.
Even though motion detectors work great, you still can't capture that exact moment when someone is not paying attention
Ha Ha Ha Ha!!!!
YouTube - House of Torment Travel Channel