Reflex has very good graphics and true to life ground effects, meaning you can actually get stuck on the edge of a paved runway. crash effects are almost non-existant, but if you crash the program resets and you are back on the flight line again. (I always considered picking up the pieces after a crash as part of the training but you don't get to do that ). The No-Fly Zones are areas in some of the scenerys that you are not allowed to fly in, meaning over homes or pit areas. They are shown as a red diagonal wall of lines. When you cross into these areas, if you are too low when you enter the area, the program resets and puts you back on the flight line. If you are high and don't enter too far, you can fly back out without a reset.