A worker has been killed during a test ride on a rollercoaster at Germany’s Oktoberfest on Monday. The fire brigade in the southern city of Munich, which hosts the world-famous festival every year, said a 20-year-old was hit by a wagon at full speed and left seriously injured under the rails. The worker was treated at the Oktoberfest site in the Bavarian capital, it said. Emergency services carried out resuscitation measures on the way to hospital, where the man died. Police are investigating the circumstances of the accident, while employees are receiving support from a crisis intervention te…