Speed king Takudzwa Ngwenya scored a blistering hat-trick of tries as Biarritz dumped Ospreys out of the Heineken Cup with a dominant 36-5 win at Parc des Sports Aguilera.
Left-wing Benoit Baby and impressive former England full-back Iain Balshaw got their other touchdowns with scrum-half master tactician Dimitri Yachvili racking up 11 points through four conversions and a penalty.
Swansea-based Ospreys, who started the match in second spot in Pool Five but level on 13 points with their third-placed opponents, had the dominant scrum but little else with their only score coming when replacement hooker Richard Hibbard pounced on a Biarritz line-out blunder for a try.
Zimbabwe-born United States international Ngwenya, regarded as one of the fastest men in world rugby, was in superb form during a one-sided rout against opponents unable to deal with his pace.
It was easy work for twice-European finalists Biarritz and they profited against a flimsy Ospreys defence to wrap up their Pool Five campaign with a bonus point triumph.