TrueHoop's Beckley Mason examines some of the NBA's signature moves and spotlights two Celtics in the process:
People associate Rondo with his fake behind-the-back pass, but that one's been around for a while. What I haven't seen guards his size do is use pass fakes from a standstill as well as he does. Opponents play off Rondo to better obscure passing angles, especially after he picks up his dribble. To compensate, Rondo, like a quarterback sitting in the pocket, uses violent pass fakes to shift the defense and open avenues to his teammates.
Pierce isn't particularly quick, so how is he always able to get space for that jumper? Part of it is that he sometimes uses unorthodox footwork in his pull-up. The natural motion for a right-handed player moving to his right is to stride-stop, plant the (outside) left foot, plant the right (inside) foot and fire. But Pierce uses his outside right foot to stop his momentum, then uses his left foot and left shoulder to nudge his defender and create space. Pierce ends up firing the shot a half-beat earlier than his defender expects and uses a little muscle in the process.