ok, how do they work? we've always just waited because we didnt like the idea of having to be back at a ride at a certain time, but I've read that isnt the case? so if we get a fastpass for 1-2 we dont have to be back there in that time? we can use it any time later or not? How do you get them anyway and can you use a fastpass from tuesday on wednesday? and how come people dont just keep a stack of them for every ride?