ASA - 1B Coach runs out on field during live ball to argue a call at 2B

[teebob21]

Championship play. The situation is not really relevant, but for context it was a banger non-routine force play at 2B. Three umpire system, I am U3 making a call at 2B on an infield ground ball (this is NOT the same play with the INT that I posted earlier). The throw from F6 was high and F4 jumped off the bag to make the catch, but landed with her foot on the base before the runner arrived. It wasn't all that close, but enough to sell it with a point, verbalize "Yes!! It's on!", pause and punch. The BR reached first safely and the return throw from F4 to F1 was overthrown and the ball was loose as the coach met me 45 feet down the 1B-2B line.

For additional context, it was Day 3 of a National and this assistant coach had already been ejected from games on Days 1 and 2. (Edit to add: Not ejected by me.)

In my shoes, how would you have reacted/handled this situation?