Not only do they have cav and armor sims, they've also got the sims for the infantry. Basically it's a room with movie screens on the walls. Your rifle has a hose that blows compressed air onto the bolt so when you pull the trigger, the bolt recoils and "chambers" just like really firing. A laser leaves the end of the barrel and strikes the "movie screen" and will register a hit or miss on the main computer. When the scenario is over it tells you how many kills you made, how many misses, and basically how much ammo you used. You even have to reload (change magazines) in order to keep shooting. It's pretty cool. They got attachment points for pretty much any weapon: M16/14, M9 Beretta, 203 Grenade launcher, M249 SAW (squad auto. weapon), AT-4 (rocket launcher), and on up! It's a lot of fun -- and you don't have to get dirty or cold or blisters or tinitus or clean weapons afterward or......
Now, as far as the dirtbike sim, you know they could put an mx seat, handlebars, and footpegs on one of those mechanical rodeo bulls!!! It couldn't be too hard to rig the electronics up to the motion controller and sit you in front of or INSIDE one of those simulators and let you ride! How awesome!!!