Boston Celtics guard Marcus Smart had a hilariously delayed reaction in Game 1 of the Eastern Conference Finals after getting slapped in the face by Miami Heat wing Duncan Robinson.

Check it out:

Look, even Celtics fans will admit that Marcus Smart is a huge flopper. While this play wasn't a ā€œflop,ā€ it was still funny to see Smart have this epic delayed reaction.

The Celtics are trying to get to the NBA Finals for the first time since 2010. They lost to the Los Angeles Lakers in seven games that season. Boston and Miami memorably met in the Eastern Conference Finals back in 2012 with the LeBron Jamesā€“led Heat taking down the waning dynasty of Paul Pierce, Kevin Garnett, Ray Allen, and more on the Celtics.

With Smart, Jayson Tatum, Jaylen Brown and Kemba Walker leading the way, Boston certainly has a good shot to make the Finals.

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