Cirque du Soleil show at Las Vegas' MGM Grand had my jaw on the floor for pretty much the entire 90 minutes. It does things I didn't know were possible in a theatrical production, including a double-decker stage that is completely detached from the floor, moving around on a hydraulic lift. It is introduced as a boat, rotating 360 degrees so that we can see the characters both on deck and inside the hull. In one of the more spectacular moves, the stage rises up completely vertical to become a cliffside. Archers in the audience stand on the handrails we use to get to our seats and fire actual arrows around the cast. This leads to a battle with people swinging up and down the (stage prop) arrows sticking out of the wall. Performers get knocked off, literally plummeting from the top of the stage to below the floor. That's just a five-minute sequence. Like I said, jaw on floor.