Spanish police arrested four Frenchmen for jumping in front of cars on a busy road so that they could film them and post the footage on the Internet, the newspaper El Pais, quoted by a Reuters report, said.
The report said the four took turns to leap in front of cars, forcing the drivers to swerve or brake sharply and putting themselves and other vehicles in danger.
Their intention was to film the reaction of drivers, on the road between Benidorm to La Nucia, and post them on the Web, local officials said.
Relatively rare in Spain, a youth craze known as "happy slapping" took off in Britain last year, in which groups of teenagers slapped or mugged strangers while filming the victims' reaction on camera phones, the report said.
The images were then sent to friends or posted on Web sites, the report further said.