The timing of this play, as described, seems improbable, if not impossible unless F6 and the runner were close to each other since the OP says the runner was directly in front of F6 when she decided to attempt to play the ball. Based on that assumption, I would lean toward INT judging that the runner didn't alter her path enough to allow a possible play by F6.
That's twice that I've agreed with CNB this week. I'm probably pushing my luck.
