If this happened in a high school game...?

[PSidbury]

In last night's playoff game, Bibby rebounds and in process loses his shoe. While shoe-less, Bibby outlets and the Knicks score on a fast break. Meanwhile, Wade picks up the opponent's shoe and tosses it off the court.
Dwyane Wade Throws Mike Bibby's Shoe Into First Row! - YouTube

For sh-- and giggles, let's pretend you are the closest ref and see it all.
What would be your action, if any, if this were to happen in a high school game?
What if Bibby's outlet pass had been intercepted, and now Bibby, on defense, is quickly leaning over to... uh, where's my shoe?

But, Ref, I saw them do it in an NBA game... (ack!)

Thanks,
Paul