Courtesy of the SFPD, I (Doug) got to experience a truly immersive simulation with the FATS (FireArm Training System). Entering a bank (via the large video screen at the front of the room), I observed a suspect threatening the teller with what appeared to be a firearm. My cries of "Hey" and "Stop that" were sufficient to draw his fire immediately, and as I had yet to take cover that proved a quick end to the simulation. I did squeeze off a few rounds of my own, and did a nice job of outlining his profile (i.e., all of them missed). I don't know how these guys do this job.