Championship bottom side Barnsley stunned Hull City with two first-half goals to seal their first away win of the season.
They took the lead against the hosts early on when Carlton Morris crossed for Callum Styles to turn in from close range.
Morris doubled their lead with a tremendous volleyed effort just before the break after making a run into the box.
Tyler Smith had come closest to getting Hull back in contention but, after working onto a fine ball from Regan Slater, his solo effort was saved by Bradley Collins.
There were boos from the home crowd after a listless performance against a Tykes side who were nine points adrift.