I didn't see this posted, so if it was lock it up. http://myespn.go.com/blogs/truehoop/0-34-107/Notes-from-a-Day-with-NBA-Referees.html There's lots more at the link, it's sort of a long post. I found what they said about blocks and charges interesting. I had always understood that planting the feet and body was essential. I guess with the speed of the NBA game it's not as important as your torso having the space occupied first??