Disapearing Door Prototype 4 Sale

its got nothing, and i wonder how safe it is, did anybody else see door strikers? what is it braced against? imagine a hit in a door like that...

It's running on tracks front and back, and what appears to be full height of the door at that. Probably much stronger than two small hinges and a striker. But good luck getting out of the car with a dead electrical system etc..