So, those spikes shot down from the top and more came up from the bottom of the door opening...

How freaking STUPID...

I'm going to state the obvious because I know there will be some to read this who don't have any understanding of why this is so stupid and wrong... but WHERE WERE THE BARS BEFORE? The top ones would have had to be retracted well above the height of the back of the truck and the bottom ones would have had to be retracted down the ground. It was something you'd see in a cartoon.