Has anyone bought one of them shake flashlights? I picked one up at Wally World. It's the Omega Light, now I would not want to depend on it in a life and death situation,but it is handy around the house. The only problem I have with it is that while shaking it the tube inside will rotate around and the switch contact will get out of posion, and trying to take it apart in the dark is a pain in the backside. Has anyone else tried them and had that problem?