Is this an accident with a Nimbus 4D you are speaking of?

On Thursday, January 14, 2016 at 12:52:15 PM UTC-8, wrote:
According to a friend present at Bitterwasser, the glider went into a kind of spiral dive at 3600 meter altitude. The pilots couldn't get it under control, and the glider lost a wing. The pilots bailed out at 700 and 500 m respectively. One is unharmed, the other has back injuries.