Rory Scannell inspired Munster to a dramatic 15-14 victory over provincial rivals Ulster to enable Glasgow Warriors to go top of the Pro12 table after they swept aside Benetton Treviso on Friday.
Munster showed incredible character to beat Glasgow Warriors last weekend in their first game since the sudden death of their head coach Anthony Foley in Paris and produced a rousing fightback to go second in the table.
Ulster looked set to make it six wins out of seven when they stormed into a 14-0 lead late in the first half courtesy of Charles Piutau's first try for the club and a Rob Lyttle score - both converted by Paddy Jackson.
Scannell went over for the visitors in first-half stoppage time at Kingspan Stadium and added the extras after Jaco Taute dotted down 15 minutes from time.
Ian Keatley missed three kicks at goal and a drop goal as Munster looked set to fall short, but Scannell capped a fine display by launching a drop goal through the posts five minutes from time to move his side above their opponents into second.
Munster's victory was their third in a row at Kingspan Stadium - the first time they have achieved that feat since the Second World War - and they are just three points behind new leaders Glasgow.
Rory Hughes helped himself to a double in a 31-14 bonus-point win for the Warriors, with Jonny Gray, Mark Bennett and Alex Dunbar also going over before Langilangi Haupeakui was shown a red card on his debut right at the end for a second yellow.
Scarlets have now won four Pro12 matches in a row after claiming a 26-15 bonus-point win over derby rivals Cardiff Blues.
Aaron Shingler, Jonathan Evans and DTH van der Merwe scored first-half tries and Hadleigh Parkes added another after the break as the Blues slumped to a third Pro12 defeat in a row.
Zebre climbed off the bottom of the table by stunning Edinburgh 19-14 to register their first victory of the season at the sixth attempt after Giovanbattista Venditti scored a decisive late try at Edinburgh to leave Treviso bottom.