Bombarded with eggs and herring - the most disgusting tradition back in Köping

The vehicles started at the bridge at Tunadalsparkeringen and finished at the bridge on Nygatan in Köpingsån.

The participants in the river race consist of students from Ullvigymnasiet's graduating classes and to win you have to build a boat that floats, have good tactics and avoid being hit by eggs from the audience.

- It was worth it in the end, says Simon Eriksson.

Watch as the students try to get through the river race in the clip above.