For a few exciting minutes in the fourth quarter, Kobe Bryant and the Los Angeles Lakers resembled the championship-caliber dynamo everybody expected this season, making a big run and surging past the Miami Heat. And then LeBron James calmly demonstrated why the Heat are the defending NBA champions and the Lakers are in 11th place in the Western Conference. James had 39 points and eight assists, Dwyane Wade added 27 points on his 31st birthday and the Heat held off the Lakers 99-90 Thursday night, scoring the final nine points to finish their six-game road trip in style.