Watch: Doc Rivers gives Pierce wheelchair as retirement gift

Doc Rivers has no chill whatsoever.

To celebrate Paul Pierce's retirement, his longtime coach sent him the perfect present ... a wheelchair.

It's a reference to Game 1 of the 2008 NBA Finals when Boston Celtics center Kendrick Perkins collided with Pierce, sending the small forward to the floor in so much pain that he was carried off and transported to the locker room in a wheelchair.

Pierce checked back into the contest against the Los Angeles Lakers mere minutes later and seemed fine, leading many to question the severity of the injury.

The Truth was a good sport about the gift, knocking off the mannequin before sitting in it himself.

"A ring came with this wheelchair! So to all you haters, BLAH!" he yelled.

Indeed, Boston went on to defeat L.A. in six games to capture the title. That marked the first and only championship of Pierce's 19-year career, which ended a week ago. He spent his final two seasons with Rivers on the Los Angeles Clippers, who recently fell to the Utah Jazz in the first round.