A zone can recognize your state of being in it, as well as when you enter and exit the brick, of course all collision and rendering and ray casting is preset to be off to allow you to freely move about the zone.
For instance, if i was to say on the zone brick Onvehicleenterzone>vehicle>setvelocity [] [] [10]
The vehicle would be launched into the air when you drove it into the zone brick. Then say, onvehicleleavezone>vehicle>setvelocity [] [] [-10] when the vehicle was launched out of the zone, it would be pushed back down by the onvehicleleavezone event.
(btw you need the zone events to go with this)
Any questions?