Oh god, I went in one of those when I did physiology and survival training in OKC City. It's a motion simulator (nothing fancy) that moves as you would expect but you are completely closed in it (ie you cannot see anything outside, just your instruments). They SLOWLY start to spin you up so you don't notice it. Then they will tell you to look over your shoulder. It feels as if you are sitting still and a line backer just tackled you. Then they bring it to a sudden stop so you feel like you are spinning super fast, then they open the door on you. Man you talk about puke!