WATCH: LeBron throws down a two-handed reverse fast-break slam

LeBron James is one of the game's most athletic players, but he doesn't showcase it as often these days, preferring to save his energy for when his team needs it the most.

But Tuesday's contest in Boston was a little bit different. The Celtics and the Cavaliers met in a physical playoff series last season, so James might have had some additional motivation to put on a show, and he did exactly that in the third quarter by throwing down a two-handed reverse dunk after getting loose on the break.

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