CLEVELAND (AP) – During a timeout in the fourth quarter of Wednesday night’s easy win over Washington, LeBron James and a few of his teammates cut loose.

As the arena’s booming sound system pumped “Poison,” a 1990 pop hit by R&B boy band Bell Biv DeVoe, James did his karaoke rendition of the song and busted a few moves as guards Mo Williams and Delonte West playfully danced near Cleveland’s bench.

They were acting foolish – and didn’t seem to care one bit.

In the comfort of home, the Cavaliers feel like they can do anything.

With a 38-1 record at home, the Cavs, who have spent this season breaking almost every franchise record on the books, are approaching a hallowed league mark.

If they win their final two games in Cleveland, they will match the NBA’s best all-time home record set by the 1985-86 Boston Celtics.

“It’s ridiculous,” veteran forward Joe Smith said of Cleveland’s home success. “We actually don’t talk about it in the locker room, but whenever we step on the floor and that record is announced before the game, it kind of sends chills through your body.”

Here’s another reason to shiver: The Celtics will visit on Sunday.

Cleveland’s only home loss came on Feb. 8, a 101-91 setback to the Los Angeles Lakers, who stopped the Cavs’ home winning streak at 23. Since then, they’ve reeled off 15 in a row at Quicken Loans Arena, becoming the first team in league history to have two 15-game home winning streaks in the same season.

There have been a few close calls along the way, most recently a four-point win over Orlando and a five-pointer in overtime against Portland.

But, other than the Lakers, no one has topped them.

“Somehow we’ve found a way to win, especially lately,” said center Zydrunas Ilgauskas, the team’s elder statesman who can appreciate Cleveland’s home dominance after playing on a 2002-03 Cavs team that went just 14-27 at home. “We don’t think any differently than we do on the road. We just come out, prepare and play.

“There really hasn’t been anything special that we’ve been doing.”

Maybe James’ should get some ruby-colored sneakers. Because like Dorothy Gale, that fictional Kansas girl with the cute little dog, ruby slippers and a longing to leave Oz, the Cavaliers feel there’s no place like home.

“What we’ve been able to do at home is unbelievable,” James said. “It’s something we can talk about way after we’re done playing. We’ve held serve at home.”

Beginning with the over-the-top pregame ceremony, which features fire spewing from four swords in the giant scoreboard to the nonstop, pulsating music played during action, Cleveland has become one of the league’s most hostile environments for visitors.

Add in championship-starved fans, who fear James’ days wearing wine and gold could be numbered, and the Cavs may have the best home atmosphere around.

Duke’s Cameron Crazies would love the Q.

Smith, whose NBA career has taken him from Golden State to Philadelphia to Minnesota to Detroit back to Minnesota to Milwaukee to Denver to Philadelphia to Chicago to Cleveland to Oklahoma City and back to Cleveland, was asked which court opponents dread most.

“I hate to sound biased, but here,” he said, “especially the past two years. When we would come to town, the fans are real tough on the opponents. This is it.”

The Wizards would know. They’ve played the Cavaliers in the first round of playoffs the past three seasons, series typified by rough play and rowdy crowds.

Cleveland’s home streak has caught their eye.

“It’s very impressive,” forward Antawn Jamison said. “History has shown only one other team has had only one loss at home. This team is on the verge of that. You have to give it up to not only this team, but the fans and the way they make this a very difficult place to come in and try to win. These guys feed off the home crowd.”

Tying the Celtics’ 24-year-old record isn’t the only thing on the Cavaliers’ agenda.

With a win at Philadelphia on Friday, they can clinch the Eastern Conference’s best record and No. 1 playoff seed, plus home-court advantage throughout the playoffs. Cleveland, which has four games left, holds a one-game lead over the Lakers for the league’s best mark.

The top team at the end of the regular season would host the first two and last two games of the finals, the only postseason series with a 2-3-2 format.

Right now, the Cavs’ focus is on Philadelphia, a playoff-bound team they’ve beaten twice this season and will play two times in the next five days. The Celtics will come calling Sunday for a possible preview of the Eastern finals. Boston, which hosts Miami on Friday, has a one-game lead over Orlando for the No. 2 spot.

“There’s a lot hanging for both teams,” Ilgauskas said. “They are fighting for positioning and we’re fighting for home court. Both teams are going to want to send a message for the playoffs. This is the last time you can do it.”

The Cavs are the first team since the 1996-97 Chicago Bulls to win 38 of their first 39 at home. Those Bulls went 39-2 at home and won the NBA championship. So did the ’85-86 Celtics.

The chance to win a title is what brought Smith back. He bought out the remainder of his contract with the Thunder in early March for a chance to rejoin the Cavs, who reluctantly traded him last summer in the deal that brought guard Mo Williams to Cleveland.

Before he left practice Thursday, Smith was reminded that he and the Cavs are perfect at home since he returned.

“Shhh,” he said. “Don’t jinx me.”

AP-ES-04-09-09 1813EDT