Gareth Bowen helped himself to 22 points as Llanelli Scarlets became the first side to do the double over the reigning Celtic League champions Munster at Stradey Park.
Bowen converted all four home tries, including his own last gasp effort that clinched a bonus point, as a 6,169 crowd was treated to a top quality match containing seven tries.
With first use of the strong wind the Scarlets raced into a 20-3 interval lead thanks to some inspired centre play from Matthew Watkins. He scored the first try and then paved the way for the second by wing Richard Rees.
But far from being down and out, Munster hit back after the break and a kick and chase try from Eoin Reddan raised their spirt. Gareth Williams replied with a debut try for the Scarlets, but two tries in five minutes by Irish wing Anthony Horgan brought Munster back to within seven points at 27-20 with 15 minutes left to play.
It was anyone's game at that stage, but Bowen kicked a penalty and then scampered over for a try in the last minute which he also converted.
The Celtic Warriors made it two out of two for Welsh clubs over Irish opposition with a superb 37-16 victory over the Leinster Lions at Donnybrook. Neil Jenkins was at it again with seven more successful goal kicks to make it 44 without a miss.
The Warriors ran in four tries to capture a bonus point, but it was the 17 points from the ever reliable boot of the world record points scorer that made the big difference.
Richard Mustoe, Sililo Martens, Shaun James and Jon Bryant grabbed the Warriors tries, while Argentinian international Felipe Contepomi scored all the Lions points.
Ospreys No 8 Nathan Bonner-Evans turned into a dragon slayer as he scored two tries to steer his side to a much needed 26-14 home win over Newport Gwent Dragons.
With league leaders Ulster going down to a shock defeat at Glasgow, victory would have taken the Dragons to the top of the Celtic League. Percy Montgomery kicked two penalties and Ben Breeze ran in a try to give the visitors' an 11-8 interval lead, but the Ospreys turned on the style after the break and Tongan international Dave Tiueti grabbed a third try and Gavin Henson ended with 11 points from the boot.
Wales Head Coach Rob Howley talks to WRU TV's Sebastian Barrett about the 36-man squad he has just named for the forthcoming Under Armour series, which includes two uncapped players, Ospreys duo Sam Davies and Rory Thornton.
Head coach Rowland Phillips is deligthed he can now call BT Sport Cardiff Arms Park home for his Wales Women's side, who launch their international season next month with games against Scotland and UK Armed Forces in the heart of the capital city.
Wales Sevens star Sam Cross has put his home town club of Brynmawr on the map after winning a silver medal at the Rio Olympics with Team GB. His club have now honoured him by naming their players bar after him, as WRU TV discovered at the official launch, recently.
One of the newest members of the Principality Premiership, Bargoed admit it's proving to be a steep learning curve at the highest level, but are determined to become a force to be reckoned with. WRU TV visited the club last weekend when they took on Llanelli.
Table-topping Aberavon travel to north Wales to tackle RGC 1404 as both teams defend unbeaten starts to the season in the Principality Premiership. WRU TV's Graeme Gillespie visited the Wizards to see how their preparations were going for the game of the weekend.
The Half a Game initiative is currently sweeping across Wales and proving a major success. The scheme aims to give every young player at least half a game every weekend. WRU TV recently visited a festival in Narberth where clubs have fully embraced the initiative.
Both Bargoed and Swansea were seeking their first win of the Principality Premiership season this afternoon. It proved a fruitful day for the hosts - not only did they win, but Bargoed claimed a try bonus point.