Just relax. LeBron James is human. No one can win a championship by themselves. No one has a great game every night. Even Jordan, in my opinion the best player ever, had another top 25 player in his prime, and a very good supporting cast. A very good team that relies on defense and a balanced offensive attack will often beat a team with a superstar and a mediocre supporting cast. That is just how basketball works. That was the case when the Bad Boys beat the young Bulls, it was the case when the Sonics beat Kareem's Lakers two years in a row, and it is the case now. This a surprise because the Celtics were written off, not because any player, even LeBron, is an unstoppable force. Just remember, even Jordan needed Pippen. Even Jordan needed Dennis Rodman to shut down the Mailman. Even LeBron is human. And that's a good thing, because if he wasn't fallible, what would be the point of watching?
Waiting For Groza