Northampton Saints ran riot to defeat Bath 71-48 in the second highest-scoring Gallagher Prem game in history.
Wales wing Louis Rees-Zammit played a starring role as Bristol posted an early-season statement.
Bath secured home advantage in the Gallagher Prem play-offs after beating Leicester 24-22 at a rainswept Recreation Ground.
Bristol upset the form book to beat their West Country rivals Bath 21-19 at Ashton Gate and keep their Prem play-off hopes alive.
George Hendy ran in four tries as Gallagher PREM leaders Northampton confirmed their place in the play-offs with a 94-33 rout of Bristol.
Bristol moved above Exeter and into the top four of the Gallagher Prem with a thumping 52-19 win over rock-bottom Newcastle at Kingston Park.
A last-minute try by England fly-half Fin Smith saw Northampton Saints snatch a thrilling 35-28 victory over Exeter Chiefs at Sandy Park on Saturday afternoon.
Bristol's Gallagher Prem play-off hopes were dealt a major blow after they suffered an 18-14 defeat against struggling Harlequins at the Principality Stadium.