They don't know when or if he'll really use it. It's not like every team we play next year is going spend practice time working on their anti statue of liberty defenses just in case.
Well of course I know that. But a Trick Play should be something that NO one thinks you have. Had Japan gotten on radio and said " We have a plan to attack the US: dont you think Pearl Habor could have been different. I know thats a bad example.