Fin Smith's last-second penalty snatched a breathless 41-38 victory for Prem Rugby leaders Northampton Saints against second-placed Bath at Franklin's Gardens.
Noah Caluori claimed another remarkable five-try haul against Sale as Saracens kept alive their outside hopes of reaching the Prem play-offs with a stunning 85-19 win.
Sale hooker Nathan Jibulu has received a six-week ban for biting Harlequins prop Will Hobson.
This was supposed to be where Courtney Lawes ended his 20-year playing career.
Northampton returned to the top of the Gallagher Prem table despite a disjointed display in a narrow 28-27 victory over battling bottom side Newcastle.
Two-time European winners Munster were dumped out of the Champions Cup at the pool stage for just the fourth time since 1998 as they were stunned by Castres at Thomond Park 31-29.
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.
A late converted try from Kalaveti Ravouvou proved just enough for Bristol to maintain their winning run with a 19-17 victory as Sale lost on the road in the Gallagher Prem for a sixth consecutive game.