This guy likely tried to blow his whistle but nobody could hear a thing so he tried to run out on the field and get attention.
I don't have any idea what was goin through their heads, but as explained by the head official, Romo, and the rules guy on the game last night it was all correct. A strange sequence for sure, but the end result was what should have happened.
Plus it ended up being a mute point as nothing was gained on that drive.