Division 1A leaders Lansdowne were back at full tilt on Saturday as they ran in five tries without reply to beat defending champions Clontarf 35-0 at Castle Avenue.
First-half touchdowns from Scott Deasy, Tom Farrell and Cian Kelleher created the platform for this comprehensive triumph. Young centre Farrell was in sublime form as Lansdowne recorded their seventh straight victory.
Clontarf had impressed last week against St Mary's College, so this resounding defeat to one of their title rivals will come as a big setback in their quest for a play-off position.
Ballynahinch are now just one point outside of the top four after full-back Adam Craig helped himself to a hat-trick of tries in their 34-13 bonus-point success against Cork Constitution.
Ballymacarn Park is a fortress for 'Hinch these days and having trailed 13-10 at the break, with Gerry Hurley dotting down for Con, Derek Suffern's side went on to dominate the second half to end the Leesiders' six match unbeaten run.
Two-try hero Rory Scannell was in fine form for Dolphin as the division's bottom side surprised play-off hopefuls UCD with a 34-15 defeat in Cork.
This was Dolphin's first-bonus point win of the season and comes on the back of last week's hard-earned triumph over Young Munster.
Meanwhile, departing out-half Gavin Dunne clipped over a cracking drop goal and penalty to steer St Mary's to a morale-boosting 13-9 win over Old Belvedere at Templeville Road.
Second-placed Terenure College got back to winning ways and also picked up a bonus point in their 22-21 defeat of Young Munster at Tom Clifford Park. Winger Harry Moore raced on to a kick ahead to score his seventh try of the campaign.
In Division 1B, Dublin University came through a test of their promotion credentials, battling past Ballymena 18-16 to leapfrog the Braidmen to third spot in the table.
Trinity extended their unbeaten run to nine matches with a try each half from Tom Collis and Brian du Toit. Full-back Conor Kearns kicked the rest of the points.
Young replacement Conor Lowndes slotted the match-winning penalty for leaders Galwegians as they saw off UL Bohemians 18-15 at Thomond Park. Improving Belfast Harlequins steamrolled their way to a 32-12 derby win over Malone at Deramore Park. Tries were shared by props Mark McGrath and Charlie Sargison, Ulster lock Neil McComb and backs Mark Glover and Rory Scholes.
Back rowers Stephen McVeigh and Mata Fifita, winger Billy Henshaw and Connacht-capped full-back Shane Layden all touched down in Buccaneers' impressive 25-7 dismissal of Shannon at Dubarry Park.
In-form Garryowen enjoyed a 39-10 triumph over Corinthians in Galway. It was an eventful day for Munster's Shane Buckley who set up the first of the visitors' six tries, was sin-binned in the second half and then returned to run in a superb solo try from his own half.