Boston Celtics guard Marcus Smart has picked up yet another flop warning by the league office after another embarrassing effort in the last minutes of Tuesday's game against the Houston Rockets.

Smart launched himself out of bounds like an invisible friend pushed him out of rebounding position as Al Horford missed a point-blank layup that could've given Boston the win.

https://youtu.be/ybuu5dCjvJE

The Oklahoma State product has a long history of egregious dives during his short NBA career, which doesn't bode well with his reputation as a savvy and physical defender.

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Here is another one for the books against the Atlanta Hawks in last season's playoffs. Notice how Smart is brutally outboxed by Kyle Korver, who weighs a good 15 pounds less than he does.

https://youtu.be/CnjCWcrtH_M

Let's just say he's not getting any Emmys for this one… if he continues, it won't be long before the league slaps a healthy fine to make him think about his pockets before attempting to fool the officials.