Hold On, Where Are Their Giant Squid Costumes?

Via SimonOnSports comes this odd video from a Japanese baseball game. Odd? Japanese? You don't say! Now, I've watched this thing about nine times and what I think happens is that the batter is called out on an appeal to first, but because the ball bounced and the catcher never tagged him, the runner is awarded the four bases safely for a "strikeout homerun." Again, I think. I really have no fucking clue.