Its actually a very technologically advanced ride. After an audience participation preshow you enter one of 2 identical `theatres` - a circular catwalk around the central core, with banks of computer monitors and lights all around - think a circular control room. The computer begins to track meteorites on the screens, then the alarms go off. The lighting changes, the station gets hit and a series of very good fx begins - SPOILERS COMMING UP - jets of smoke and air shoot out from the wall, the floor grates, the ceiling, pipes drop loose from above, a corridor leading off the set fills with (real) fire and a meteor hits the opposite side of the room, causing an air leak - and all the smoke begins to get sucked out until the emmergency door is shut. The room atmosphere actually does get sucked out - as the air pressure is increased slightly anything airborne leaves via the only unsealed exit - this hole, complete with smoke and sparks. Finally, the central core in the centre of the room literally explodes (VERY hot!) and you are squirted with water during a second central core explosion, as the floor drops a few inches and the lights go out!