Base on balls, then continue to second

[greymule]

Ball 4. F2 returns the ball to F1 in the circle. BR can round 1B, run toward 2B, stop 2 inches before 2B, and then either step on 2B or return to 1B. She has not violated the LBR.

Once she reverses direction, however, she must continue non-stop back to 1B.