This big man is Boston Celtics forward Brandon Bass.
Last month, he began taking swimming lessons with children from the Boys & Girls Club of Boston.
The 28-year-old father is learning to swim so he can enjoy the off-season with his family and encourage young children to conquer their fear of swimming.
But surprisingly, the little swimmers are doing most of the encouraging here.
Watch as the children cheer him on during a back float lesson.
