If you've ever thought to yourself, "I'd like to spend 30 seconds of my life watching strobe lights go off at Michigan Stadium", then I have the video for you. I honestly have no idea why I found it so enthralling, yet I stood around thinking how you could run a pretty good night club in there with the strobes and the klaxon. Plus the sequential firing of lights by floor is nice a touch. It's reassuring to know our stadium will look good even as a hundred twenty thousand people flee in the walls of flames ravaging it. The barely audible voice on the video is saying that the sound is a fire alarm and you should carefully proceed to the nearest exit.
For the worry prone types, it is just a system test. I hung around for 10 minutes and no emergency vehicles came flying out of the DPS station across the parking lot. Also no sign of the Ann Arbor Fire Department.