[Forest Ump]

It's a four base award. If he stopped at third I would treat it the same as a hit batsman. He doesn’t get to chose whether to go to a base or not. If he abandoned the bases, it would simply be an out. No base hit. Not a scoring expert but I think that's right.

7.05 Each runner including the batter-runner may, without liability to be put out, advance—
(a) To home base, scoring a run, if a fair ball goes out of the playing field in flight and he touched all bases legally; or if a fair ball which, in the umpire’s judgment, would have gone out of the playing field in flight, is deflected by the act of a fielder in throwing his glove, cap, or any article of his apparel;