Watch: Smart ejected after shoving J.R. from behind in Celtics-Cavs scuffle

It's only an NBA preseason game, you guys.

J.R. Smith and Aron Baynes got tangled up around the basket late in the first quarter of Saturday's Cleveland Cavaliers-Boston Celtics matchup at Quicken Loans Arena.

Baynes flailed Smith around after their arms became entangled, resulting in Smith shoving Baynes in the chest.

This prompted Baynes' teammate Marcus Smart to run in and push Smith from behind, with Smart and Smith needing to be separated by players and officials.

Smith had a giant smile on his face as the infuriated Smart made a beeline at him. It also appeared as though Smith may have pushed one of the officials who was attempting to keep him at bay.

Smart was ejected from the game for his role in the scuffle, while Smith was assessed a personal and a technical foul. Baynes was whistled for just a personal foul.