The logistics of getting camera equipment into such a location and filming in total darkness was just one of the challenges in making 20,000 Meters Under the Earth. Filming was also on hold for years following an incident in which one of the researchers was injured in a rock fall of 1000 meters. The incredible rescue operation involved more than 700 volunteers from Germany, Austria, Switzerland, Italy and Croatia lasted 11 days and was watched by millions of people on TV and the Internet. Not only did Johann Westhauser make a full recovery, he went on to rejoin the team and be part of this film production.
In 2014 Das Riesending cave in Bavaria made international news when one of the researchers was injured in a rock fall of 1000 meters. The incredible rescue operation involved more than 700 volunteers from Germany, Austria, Switzerland, Italy and Croatia lasted 11 days and was watched by millions of people on TV and the Internet. Not only did Johann Westhauser make a full recovery, he went on to rejoin the team and be part of this film production.