H/T Piano Girl, who had us howling with The Perfect Fifth (stay with it):
H/T Ace another example of the singularity of baseball.
Jockeying for advantage, first the batter switches his hand, then the pitcher switches his, then the batter switches back, then the pitcher switches back… until the umpire has had enough and demands both use their right hand.
The second video here gives you the whole play-by-play: