This weekend the Bryce Jordan Center will be full of bull -- the four-legged kind.

The Professional Bull Riders Inc. (PBR) is bringing its Enterprise Tour, "the toughest sport on dirt," to Penn State for the first time on Friday and Saturday at 7:30 p.m.

"For a number of years we've been trying to get PBR to come here and finally were able to work the schedule -- and the dirt issues -- out," Bernie Punt, director of public relations for the Bryce Jordan Center (BJC), said.

Normally the most dirt the BJC sees is from the bottom of its visitors' shoes. But starting early this morning, 600 cubic yards of the stuff will be spread over the arena, and by Friday night more than 60 bulls will be sending it and their riders flying.

"The BJC has had everything from elephants to lions to tigers, but we've never had bulls -- well, except for Michael Jordan," Punt said.

PBR is hoping to gain some new college fans of the sport, Kristin Van Scoyk, marketing coordinator for the PBR, said. Many students were surprised to find out about this event.

"It seems quite unusual. I wouldn't expect bull riders to come here. It's certainly interesting," Lincoln Barnard (sophomore-information sciences and technology) said.

The Enterprise Tour is PBR's newest competitive series and offers upcoming bull riders the opportunity to compete in events while earning money to qualify for the PBR's Challenger Tour Finals and Built Ford Tough World Finals.

"This event is much different than the one's the BJC normally offers. I'm sure there's an audience for bull riding at Penn State," Matt Richards (freshman-theatre) said. "If tickets are reasonable I would go."

Scoyk said each night will feature about 40 riders, both current and upcoming stars.

"The goal of each rider is to stay on his bull for at least eight seconds in order to score points.

Because the riders are trying to earn not just money, but a chance at competing in other events as well, it is very competitive and anything can happen," Scoyk said.

The competitors, who train on their own time either by working on ranches or going to the gym, hail from all over, including Pennsylvania, Texas, Florida, Minnesota, Utah, Mexico and even Brazil.

"It takes a special breed of person to be able to do this. It's an incredibly tough sport and takes a lot of strength and balance.

It's really great to watch younger guys going crazy and having such determination even after getting banged up," Punt said.

But the riders aren't the only ones competing. The bulls are scored for every ride and are awarded points.

The top 50 bulls are honored with a listing on PBR's Web site, which is www.pbrnow.com.

While in Happy Valley, the bulls will be enjoying the comfort of local farms when they are not at the Bryce Jordan Center, Punt said.