Did the umpire over react?

[Big A]

I saw this in a game tonight and I just wanted to see if they thought the umpire over reacted.

Bottom of the 7th, 2 outs and runners on first and second. A slow chopper is hit to the shortstop who comes into the infield grass to field the ball. The runner going to third starts screaming "Miss it, miss it" and distracts the shortstop who lookes up at the runner and bobbles the ball. All the runners are safe and the umpire tosses the runner going to third for unsportsman like conduct.

In my opinion I would have just called the runner out for interference. Then the game would have been over.

What would you have done?

Thanks in advance for your comments,
Adam