Disney FASTPASS allows guests to make 'reservations' for a particular ride to avoid waiting in long lines. As you approach an attraction that uses the FASTPASS system, you will see three lines. One is the FASTPASS distribution line (where you can make your reservation), the second is the FASTPASS entrance (when you're returning to ride after making your FASTPASS reservation), and the third is the Standby entrance. Each line will have a clock noting the window of time during which you can return to the attraction with no further wait if you select the FASTPASS option.