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Smart directed the gesture toward the crowd after missing a 3-pointer<p>After an impressive regular-season campaign that saw them grab the No. 1 seed in the Eastern Conference — albeit with more than a little help from the Cleveland Cavaliers — the Boston Celtics are in a shocking 2-0 hole after the …

Read more at CBS Sports: http://www.cbssports.com/nba/news/watch-celtics-marcus-smart-appears-to-flip-off-a-fan-during-game-2-loss-to-bulls/