Bristol ran riot in a remarkable first half to secure their place in the Investec Champions Cup knockout phase with a 61-49 victory over the Bulls in Pool Four in Pretoria.
The South African hosts fielded 10 Springboks in their starting XV in the hope of registering a first win of the group campaign yet were still swept aside at Loftus Versfeld.
Bristol started like a freight train, running in three tries inside the opening 10 minutes and seven in total to build a interval 47-28 lead.
Wing Noah Heward crossed twice and there were also touch downs for Benhard Janse van Rensburg, Max Lahiff, Kalaveti Ravouvou and Kieran Marmion.
The Bulls offered more resistance in the second half but Bristol continued to fire shots with Heward completing his hat-trick, Pedro Rubiolo breaching the whitewash and Ravouvou running in his second.
A third win in as many outings in the competition lifts the Bears to the top of Pool Four above main rivals Northampton and Bordeaux, who collide at Stade Chaban-Delmas on Sunday.
Glasgow down Clermont to book knockout place
Glasgow Warriors are also guaranteed a spot in the last-16 of the Champions Cup after claiming a third bonus-point win on the spin by beating Clermont Auvergne 33-21.
After edging out Sale in their Pool One opener and then hitting back from 21-0 down to stun six-time champions Toulouse last month, the Warriors took charge at the Parc des Sports Marcel Michelin.
First-half tries from Euan Ferrie, Huw Jones, Kyle Steyn and Jack Dempsey, three converted by George Horne, helped the visitors establish a 26-7 lead at the break, with George Moala scoring for Clermont.
But Patrick Schickerling was yellow carded for offside, with Horne joining him in the sin bin for a deliberate knock on, with Clermont awarded a penalty try and Glasgow down to 13 men.
Clermont capitalised on the two-man advantage as Irae Simone touched down, closing the gap to five points just after the hour, but Steyn’s second try made sure of a Glasgow win.
Having made sure of a spot in the knockout stages, Glasgow could claim top spot in their group by beating Saracens at Scotstoun next weekend.