A reward has been offered to help catch a saboteur who left a rope stretched across a woodland trail which knocked a cyclist off his mountain bike.
Lukasz Sikorski was lucky not to be badly injured when he was clothes-lined by the blue corded rope which was tied between two trees in Hamsterley Forest, Co Durham, on Sunday.
His fall as he descended the snowy trail at 20mph was captured on his helmet camera.
Mr Sikorski, originally from Poland, looked bewildered after the crash, which came on a steep slope after a tight bend.
Craig Hunter, of the Descend Hamsterley track, posted a message on the site's web page urging other users to beware.
He said: "By rights this user should have received serious injuries - possibly fatal.
"We stress that this is a pure attempt to seriously injure users of the facility.
"A substantial reward has been offered to anyone who has any info which leads to an arrest."
Durham Police have also appealed for information about the incident.