And now the Celtics have struggled ever since making the deal. When you watch this highlight, or lowlight, you'll see why the team’s fans have another reason to hate on Green:  During a game against the New York Knicks last week, Green managed to have one of his dunks blocked by his own head! Now, I'm not the most knowledgeable about basketball rules but it appears the shot went through the net and then bounced back after hitting Green's head so I think, it's a basket!