Does This Usually Happen?

When Dustin Pedroia doubled in the bottom of the third inning, I noticed something odd.


Look towards the ump's chest plate below. (Click to enlarge)

See that little poof of dust/chalk/smoke?

It has dissipated slightly in the one below:

And it's gone in this screen shot:

Maybe it's just because little Dusty hits the ball so squarely, but I can't remember ever seeing that before. Perhaps Joba was hitting the rosin bag especially hard? I don't know.

Just thought it was worth pointing out.