Celtics fans were left holding their breathe after Brown crashed to the floor following a dunk.
Brown got loose on a fast break and raced to the basket before throwing it down hard.
However, he lost his grip on the rim and fell down hard landing on his head.
Team-mates immediately rushed to his aid as Brown lay there motionless with a worrying gaze in his eyes.
After being attended to by medical staff for a few minutes Brown was able to walk to the changing room on his own accord.
And Minnesota fans showed their respect to Brown for being able to get up after his nasty fall by giving him a standing ovation as he made his way off the court.
The Celtics announced Brown would not return to the game against Minnesota for the final quarter.
They tweeted: “#NEBHInjuryReport: Jayden Brown is out for the remainder of tonight’s game and is being evaluated for concussion-like symptoms.”
NBA stars soon took to Twitter to show their support for Brown and sent their well wishes to the 21-year-old.
LeBron James said: “Prayers sent to you right now and up Jaylen Brown!!!! Glad to see you walk off on your own.”
And Damian Lillard echoed the Cleveland Cavaliers star’s statement by saying: “Happy to see Jayden Brown walk off.”