Rik Smits is a retired NBA player. He earned his nickname "The Dunkin Dutchman" by being Dutch...and dunking. The dunking part wasn't much of a challenge since Rik was 7'4". He spent his whole career (1988-2000) with the Indiana Pacers, earning one NBA All-Star appearance.
Here's a fun little low-def highlight reel with an unexpected soundtrack
http://youtu.be/4LOw1Du8VLY