Some kind of pipe had ruptured, causing a leak of boiling water rushing out to the surface. This caused a heavy fog which severely limited visibility. No one knows exactly why the bus driver went "crazy" and drove through the sidewalk, but some people speculate that it was because he tried to get around the police road block. However, according to the bus driver, the bus just went out of control and started accelerating.One 65 year old man was killed in this unfortunate accident and several others wounded. www.dn.se/nyheter/sverige/en-dod-nar-buss-skenade-efter-over [1] (In Swedish)