We
built this pop up for 2005 and it worked really well for Halloween night. I had a couple of people startled because
of it. It is driven by a screen door closer and is hooked to a solenoid that is triggered by a motion detector.
The spring inside the closer caused the skull to turn on its way up to make it look like it was turning to look at you when
it was tripped. This is a very easy and fun prop to build.
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