Scot Pollard's having a really good Thursday ... the ex-NBA champ is leaving a hospital just two weeks after undergoing heart transplant surgery -- and to celebrate, he had a little bit of hallway party at the medical facility!!
Check out footage of the former Kings center as he made his way out of the Nashville building some 13 days after getting a new ticker ... he danced his tail off -- before he rang a victory bell.
Docs and aides were all there to congratulate him on the big moment .