http://www.cbc.ca/news/canada/british-columbia/story/2012/08/22/bc-hang-glider-death-investigation.html

“The investigation concluded that the passenger’s harness was not
connected to the glider on takeoff. The required 'hang-check' (or any other
suitable method of harness/glider connection test) was not performed prior to
the pilot committing to takeoff,” the association said.