Watching Doc Rivers on the sideline during Celtics games is worth the price of admission. He stomps around after questionable calls, smiles sarcastically after a ticky-tack foul, and places his hands, fingers spread, above his head in disbelief when he completely disagrees with an official’s decision.

Wednesday night in Toronto, Rivers was especially annoyed with the officiating at Air Canada Centre, especially the calls of Brent Barnaky. Barnaky is in his third season as an NBA official and, at 37, is one of the youngest in the league.

Before becoming an official, Barnaky was a civil trial lawyer, so he doesn’t lose many arguments; he still works as a pro bono lawyer in the offseason.