Kelly Olynyk

Boston Celtics center Kelly Olynyk plays in overtime of an NBA basketball game Tuesday, Dec. 20, 2016, in Memphis, Tenn.

(AP Photo/Brandon Dill)

WALTHAM -- Boston Celtics big man Kelly Olynyk suffered one of the stranger injures of the season Sunday afternoon when he was tripped by a young boy while warming up for practice.

Olynyk and teammate Jaylen Brown were going through a shooting drill when one of the assistant coach's sons darted onto the court. Olynyk tripped over the boy, fell to the court, and walked immediately toward the trainers area. As he left the court, he could be heard muttering expletives at his misfortune.

Celtics PR later informed the media that Olynyk will miss Sunday's practice due to the injury, which was labeled a rolled right ankle.

The Celtics often have a pack of children around the team -- player's kids, coach's kids, and sometimes other friends or family members. The family environment is usually charming, but in this case bad luck won out.