That looks like a poorly made 'russebuss'. It's a celebration everyone does in Norway when they graduate. They buy 'russeklær' (clothes they wear) and celebrate before and after the national holiday. It's popular to have a van with your 'crew', while some choose to buy a bus. It's basicly just an awesome month long party, and I can't fucking wait http://www.bbc.co.uk/dna/h2g2/A678990 Really small article about russ.