The summaries always seem to be either “it’s two guys throwing a ball to each other with another guy trying to bat it away with a stick” or “a line drive is out, except when someone pulls a Boston reverse. In that case the guy is still out, but his team (which previously was out) is now in, but only if the ball was originally spinning counter-clockwise. If the ball is spinning clockwise, the team that is out gets an out, and an innings which they can use at any time if they are playing at home, and only during a time out called by the home pitcher if playing away”. There is no in between.