In situation 7.3.1 G, what is the umpire's ruling if B2 steps out of the batter's box after a pitch gets past F2?

When a situation arises where B2 steps out of the batter's box after a pitch has gotten past F2 (the catcher), the correct ruling is that play continues without penalty. This is because once the pitch has passed the catcher, the action taken by B2 stepping out of the batter's box does not lead to any infraction that affects the game's flow or rules.

This circumstance recognizes that the batter has the right to step out of the box if they choose, particularly after the play is effectively dead following a pitch that didn't result in a play. It shows an understanding that allowing a batter this freedom maintains the flow of the game without imposing unnecessary penalties.

Other options, such as charging a strike or declaring B2 out of the box, would incorrectly penalize the batter for a choice made after a pitch that has already become irrelevant for immediate gameplay. Similarly, describing the action as a delay of game does not apply here because there is no intentional disruption to the game; B2's action doesn't hinder the continuation of play.