In case you were wondering, the answer to the question is yes: Brad Stevens seems polite even while he gets ejected.
It was a frustrating night for the Celtics in Sacramento. The team was shorthanded with Rajon Rondo (rest) and Jared Sullinger (mild concussion) both sitting out. The officials swallowed the whistles despite DeMarcus Cousins having five fouls late in the contest and repeatedly making some questionable contact that the officials let go.
So after Wallace was whistled for tech late in contest, when the result had been decided, Stevens decided enough was enough. According to the head coach postgame, it was his first ejection on any level of coaching, making February 22, 2014 the answer to a trivia question now.