It's not the 3 step or that he elbowed him that gets me. It's the fact that he seemed to reach out TO elbow and knee him. You can easily see that with the head-on camera perspective. Bosh is off the Pierce's left and Pierce, because he wouldn't be able to go through Bosh if Bosh was in proper position, had to stick out his joints to the side where Bosh actually was to give off the air of toughness.
Super thumbs down, but, then again, who's surprised of this kind of shit?