Any or all of them could be of the 30-second variety. Say you're behind and the other team is coming down, on the move, with time running short. You need the clock stopped. They're trying to run the clock out. You want the clock stopped, but you don't want to allow them time to go to the sideline and get a play.
Judgment is something, but rules misses is something else.
Gaston acknowledged that the 2000 season was marked with several controversial calls. He remembers two in particular. The first, of course, was the touchdown pass that decided the Tennessee-Florida game in Knoxville. The official said he did. The official had a great look.