The motor, now hanging upside down, rips out the wood and acts like a jackhammer and blows the rest of the crate apart. It stopped only after the motor ripped its own cord from its back. All this happened within 15 seconds. Almost all the screws ripped out the Hardy board and 1 x 2s, the wiring was a big tangled mess and all that was left, was a pile of scrap wood. I stared at it for about a minute, then walked out of my workshop and did not come back to clean up the destroyed prop till the next weekend. (No, that picture is not the prop. But thats almost what it looked like.)I had an old 120v motor out of a floor standing belt sander that I wanted to use for the shacking. I made a a 6 diameter alum plate with a hole drilled 2 inches off center. I cut a slot into the bottom of the crate and had the alum plate stick through it. The idea was, when the motor spun the plate around, it would hit the top of the pallet and lift the whole crate up and bang it around violently, like a big cam. (This would be another mistake. You know the kind a horse power you need to lift a wooden box with the weight of motor and chains attached? Well neither did I and I still don't. But I bet a lot more then ¾ horse) The motor was hooked up to a Terror By Design prop controller and a dimmer switch to adjust the speed. OK, now for the moment of truth. I plugged in all in and hit the little red button on the controller and BAM. The plate spun around hitting the top of the pallet and STOPPED DEAD. The motor wasn't strong enough to lift the crate. Well after some brain storming I thought I would just lift the motor so that the plate doesn’t hit the pallet and will just vibrate the crate violently. I did that and hooked it all up, hit the red button and holly shit did this crate shack, jump, vibrate, and just go nuts. It looked great. But just as I was admiring my new creation, I saw the top start to come lose from the sides, and then one of the eye bolts ( that was holding the chains down) ripped out of the wood. With out that one chain, it moved off to the side of the pallet ripping the other 3 chains out making the crate totally flip on its side.