You in the UK or the US? Have you been to the F.A.S.T website? Also F.A.S.T is for martial artists who want to pressure test their techniques under the influence of adrenaline. A bulletman (a guy dressed in a specially constructed suit..able to take full force strikes to any area of the anatomy) will intimidate you and engage you in a confrontation. You will then respond to that threat and the bulletman will only go down when he deems the strikes powerful enough to put a grown man on the floor.

Why do you want to do F.A.S.T?