Critical Hits updated the classroom game of Mafia/Assassin for Snakes on a Plane:

Every round, the snakes will bite someone, and the Snake will learn the truth about one player. The Captain tells everyone to close their eyes. Everyone makes noise (with one hand only!) to simulate the turbulence and sounds of flying. After that, the Captain tells the Snakes to open their eyes. They must come to a consensus about which passenger they will bite. Once they have picked someone, the Captain notes who was picked, and tells the Snakes to close their eyes…

I guess this could be played while waiting in line on Thursday night?