You wouldn't know it from watching the videos, but members of increasingly popular fight clubs say they beat each other up to feel more alive.
Inspired in part by the 1999 hit film "Fight Club," these real-life brutal clubs are growing in popularity.
They're made up of consenting adults who hold organized, often videotaped fights.
Authorities are not very worried about the adult fight clubs but are growing concerned about the rising number of fights among teenagers being videotaped and posted online.
The Web site www.comegetyousome.com has hundreds of fight videos, many of which involve teenagers.
Some show girls fighting.
Challenging Task for Authorities
The Web site's founder, Blake Cater, says the site gets a minimum of 25,000 hits a day.
Cater's fights with his brothers and friends have been posted on the site as well as on MySpace.com and ACIDplanet.com.
"I don't see how it's hurting anyone," Cater said of the fights. "I think kids can see much more dangerous stuff, much more violent stuff on the Internet than just some kids fighting."
Authorities, however, worry that online fights are going too far and are possibly inspiring teenagers to pick fights or become increasingly violent.
"More and more in juvenile cases we are seeing the use of Myspace.com as a means to communicate about criminal behavior, to joke about, laugh about it," said Fred Wist, a deputy prosecutor in Tacoma, Wash.
Two teenagers in Washington were arrested earlier this month for a fight they picked and posted on MySpace.com, in which they beat a classmate repeatedly.
Authorities are now actively working with schools to monitor sites like MySpace for fight videos. With thousands of new videos posted every day, though, they have their work cut out for them.