Relegation candidates London Irish ripped up the Aviva Premiership form book by stunning title play-off contenders Gloucester 18-12 at Kingsholm.
Irish had already lost three times to their hosts in domestic and European competitions this season, but two first-half tries from lock George Skivington helped the Exiles exact revenge.
Centre Steven Shingler added a penalty and conversion, while England international Freddie Burns booted four Gloucester penalties, yet Irish deserved a first Premiership away victory this season at the seventh attempt, which was sealed by full-back Tom Homer's late penalty.
It took them five points above bottom club Sale Sharks, who tackle Saracens on Sunday, and sent them into a five-week league break with renewed optimism of avoiding the drop.
In contrast, a losing bonus point was scant consolation for Gloucester after a four-month unbeaten home record disappeared.