His 3-pointer made it 102-91 and then the self-proclaimed “Black Mamba” slithered down the lane for two quick baskets that got the Lakers within 104-95. The Celtics, meanwhile, began to stand around on offense, thinking the game was in hand.

It was anything but.

After Vujacic hit a 3-pointer, Vladimir Radmanovic made a steal and dunk to make it 104-100 and Celtics fans, who had been dancing moments earlier, began to panic. None of Boston’s players seemed to want the ball as it moved around like a hot potato before Rondo missed a jumper with 44 seconds left.

Bryant’s free throws brought Los Angeles to 104-102 before Pierce slashed down the lane and got fouled by Derek Fisher. As a few of his teammates locked arms on the bench like a college team trying to advance in March, Pierce knocked down both foul shots. Then, on defense, he got just enough of Vujacic’s shot from the left wing with 14 seconds left.

Posey was fouled on the play and calmly made his two free throws. The Lakers rushed the ball down but missed on a couple jumpers, and when the final horn sounded, a collective sigh of relief rushed through the exits as the Celtics and their fans left the building confident, if not shaken.

“We’re not settling on a 2-0 lead,” Garnett said. “We want to go out there and win two games in L.A.”

Called “unstoppable” by Lakers coach Phil Jackson, Bryant got off to another slow start. He missed his first two shots, one an uncontested layup underneath and was unable to get the looks he wanted as the Celtics followed the MVP around like a pack of hungry wolves on the hunt.

Bryant was just 1-of-4 from the floor when he was called for pushing off on Allen — his second personal foul — and spent the final 1:59 of the opening period a few seats away from Jackson. Soon, Bryant was joined by Lamar Odom and Jackson was forced to give his reserves extended early minutes.

They weren’t good ones.

The Lakers’ heralded bench bunch struggled, and the Celtics took advantage. Trailing by two after one, Boston opened the second quarter with a 10-0 run, capped by Pierce’s 3-pointer. As bad as Los Angeles was playing, the Lakers hung around and closed within 41-37 on Gasol’s three-point play.

Slide show   NBA Finals Images from historic matchup of Lakers, Celtics more photos

But Pierce knocked down another 3, Allen followed with one of his own and the Celtics closed the half with a 13-5 burst to open a 54-42 halftime lead.

Notes: Jackson, a renowned world traveler who often reviews trips to his destinations, was asked for an overview of his extended stay in Boston, where the weather this week ranged from chilly, October-like conditions to sweltering heat. “It’s very green,” Jackson deadpanned, drawing laughter at the reference to the Celtics’ primary colors. “Boston Commons, the Public Gardens. Very green.” ... Among the celebrities in attendance: Boston Red Sox Curt Schilling — wearing a Larry Bird jersey — Jon Lester and Josh Beckett, NFL quarterbacks Donovan McNabb and Vince Young and actor Leonardo DiCaprio. Lester, a cancer survivor who recently pitched a no-hitter, was honored during a timeout in the second quarter.

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