I don't understand why guys don't think it possibly couldn't have hit the bat. How many times have you heard a "tick", or "tink" with an aluminum bat, and the ball doesn't change direction? Bob heard something. Maybe he heard the "tick" and didn't see the ball hit the ground, or maybe he heard it hit the ground and thought it was a foul tip. It seemed to me that the batters reaction was that it hit the bat and was surprised that F2 caught the ball.
I didn't know that accusing an umpire of "making sh*t up" was cause for ejection.