Accident notification In co-operation with the International Slackline Association (ISA) we collect incidents and accidents. Please report them using the form and help others not to make the same mistakes again. Accident reports and presentations are created from the reports. The Expert Group for Mountain Accidents (FEB) supports the judiciary and insurance companies in the assessment of mountain accidents from a technical alpine perspective by providing suitable experts. Swiss Highline is a member of the FEB with observer status.