Korean league baserunner slides into home plate as teammate is batting

When you're on third and your team's down one run with two outs in the ninth inning, it's crucial that you find a way to score. But sometimes, in these pressure-packed situations, signs get mixed up and situations such as this can arise:

The LG Twins batter ended up flying out to end the game, so the play didn't matter much. But still ... what?