The 18-19 year olds who graduate upper secondary school, have their own special celebration that goes on for a few weeks in May. They dress in overalls, mostly red or blue (depending on what school they go to) and do strange or funny things. (They also party outside during the night, playing very loud music.) You can read more about this Norwegian tradition in English at
Wikipedia.
My sister "Imzadi" took these photos of some red "russ" who were pretending to be traffic police. They'd brought hair dryers to make it look like they had radar speed checks, and whistles that they were blowing while stopping the traffic to let pedestrians cross the road.
Photos: Imzadi
