I did not accidentally purchase a $200 train ticket. I just got confused and excited about the idea of going to a music fest in Trondheim for significantly less than $200. by:Larm is described on the 120 Days myspace* page as a Scandinavian SxSW. Which may or may not be true, but not having been to SxSW, it is less likely that I would be disappointed if I went.
*my hatred of myspace has been mitigated by it's usefulness in looking up indie and Norwegian bands, but is not completely dissolved.