NFHS "ball four" mechanic

[chapmaja]

I have always been instructed to indicate ball 4 verbally if the batter doesn't react, then take the mask off and watcher her down the line to first base, unless there is other action requiring your attention (such as a runner coming home on a passed ball/WP for ball 4).

This does bring up an interesting situation.

R1 on 3rd, B2 has a 3-2 count. Pitch is a wild pitch over the catchers head for ball 4. The batter turns throws the bat toward her dugout, and starts going to first base at the same time the pitcher is covering the plate for R1 coming home. R1, B2, F1 and the throw all reach the plate about the same time. What do you have?