I can't recall ever flat-out running into a base runner. But I've on occasion done the Cupid Shuffle as I move in from the C position on a trouble ball to left field, and the runner at second base is facing me while watching the ball, and deciding whether to advance or go back to the bag to tag up.

When I try to go to the right of her, she'll start moving toward third. Then I'll adjust and try to go to the left, and she'll change her mind and start heading back to second. One of these days we're going to wipe each other out.