I am always happy to see these borderline guys get a chance to play in the NBA. It is obviously Johnson's dream to make it big time and for a few games, he gets to play with the best. He was having a great time out there.
Who knows, he may put on some weight and develop some skills, but if he goes back to the D-league forever, he will always get to say he played in the NBA for a short period of time, and that is awesome.