the only reason they would extend the time would be if the ride shut down.. some CM's will allow you to come back after your time.... although my family was next to get on Screaming when the ride was shut down.. and they had used their fastpast , and the CM's shut the fastpast machine down also.. so they couldn't even get another one... I protested to another CM who gave them a hand written fastpast.. which they gratefully used when the ride was back up.. I normally would not have done that.. but they were so close to getting on when it shut down.. that I felt it wasn't fair that they had used their only fast past and couldn't go on the ride..