Fire Drill

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http://games.slashdot.org/article.pl?sid=09/02/05/1136228

"Researchers at Durham University have modified a video game and turned it into a fire drill simulator using the Source engine (the 3D game engine used to drive Half-Life 2), and created a virtual model of one of the university's departments. Dr. Shamus Smith said that although 3D modeling software was available, modifying a video game was faster, more cost effective, and had better special effects. 'We were interested in using game technology over a customized application and the Source Engine, from Half-Life, is very versatile,' said Smith.

Plus there might be mutants shooting at you during a fire. You never know.