One of the privates pick up the lantern and rubs it. A Genie pops out.
"I will give you each one wish; that's three wishes total," says the Genie.
The first private says, "I want to be back in my warm dry barracks room, surrounded by beautiful women with all the pizza and beer I can handle.
*POOF* the first private disappears.
The second private says, "Good idea!" I want to be there also." Looking at the First Sergeant, the private adds, "and surround our room with a large wall, so we can't be bothered by sergeants!"
*POOF* the second private disappears.
The First Sergeant says, "I'm very curious. Please tell me more about this wall."
The Genie explains, "Well, it's about 150 feet high, 50 feet thick and nothing can get in or out."
The First Sergeant says, "Fill it up with water."