[Someone is here to challenge that unrivaled marksmanship. Ai doesn't believe for a second that Zero didn't know she was nearby or that she could possibly sneak up on him - too many years spent with him to know better. So she can't possibly surprise him when she appears at his side at the shooting gallery.
Little ducks bob up and down, side to side at a regular interval for the time being. She's already picking up the BB gun that is used to play this particular game and checking it like an old pro.]
Loser does the dishes for a month.
[Not that Ai actually has a problem doing her chores but still, they have to compete for something.]