Here's the hook:
You and a buddy are on a road trip through the desert, when you decide to take a little side path instead of the main road. After a few hours, in desparate need of fuel and snacks, you come upon a little forgotten waystation. While your buddy refuels, you decide to stretch your legs a bit and check the place out. "It does seem odd that no one is around to work the station, but maybe they are around back at that little shed", you think to yourself. Upon opening the door to the shed, you see a long, narrow staircase that descends into the gloom. Following it to the bottom, you come upon a shiny, silver elevator. Inside the elevator you find no buttons, but rather a key in a console with strange markings and the words "US GOVT". Before you can go back to grab your buddy, the door slams shut on you, and the elevator lurches vertiginously downward. After an unfathomably long descent, the elevator stops and the doors slide open. Before you stretches an immense warehouse, being tended to by strange "personelle" in white jumpsuits. Donning a jumpsuit from a nearby hook on the wall, you find you are able to traverse the warehouse floor freely. If ever there was a time NOT to forget your camera, this is it, for this warehouse is stocked with the most amazing objects you could ever have imagined...
This is THE warehouse that the US and other world governments use to store all the things that everyone says "I bet the govt has one of THOSE..." Anything you wish they had, or are sure they are hiding. What secrets lay within this warehouse? I put that to you, the faithful UM followers...