It's not "Boo-yah!" anymore.

Jim Cramer's signature exclamation changed its tune Friday to "Boomer!" when he filmed his CNBC show "Mad Money" at the University of Oklahoma.

"Oklahoma is not just OK, it's fantastic," Cramer said at the beginning of his show filmed on stage at the Donald W. Reynolds Performing Arts Center.

Cramer reaches millions with his TV show and books about getting rich through the stock market. He brought his signature loud, fast-talking style to Norman on the invitation of OU's Price College of Business.

Almost 800 students packed out the performing arts center on the OU campus for the filming of Friday's 5 p.m. show. Students were decked out in crimson and cream and cheered loudly for Cramer as he ran through the audience onto the stage.

Students stayed on their feet during filming for the show, which had enough energy it felt like it was being broadcast live. Cramer took questions from students in the audience and interviewed the CEOs of Devon Energy and Chesapeake Energy about natural gas.

Cramer read the script he'd written in his characteristic style and also ad-libbed responses to questions, all without reshooting or stopping the cameras except for commercial breaks.

The show had a quick turnaround.

Filming began about 3 p.m. for the show, just after the stock market closed for the day after plunging about 200 points.

In an interview with The Transcript at about 12:30 p.m., Cramer said it would be a challenging show because he had to find something positive about the day's losses. When asked how he would do it, he said he would figure it out.

"I've got two and-a-half hours," he explained.

Cramer monitors the stocks closely throughout the day, looking for trends and material for his show. Watching the stocks is something he's done for years.

"Every day of my life since 1977," he said

And he hasn't gotten tired of it. Even during his interview, he kept glancing at the stock news on TV and checking stats on his computer screen. He was constantly in motion but, thankfully, didn't feel the need to shout like he does on his show.

He said he started his "Mad Money" career after being a hedge fund manager. He felt he'd earned enough money and wanted to do something more. So he said educating others about the stock market has become his passion.