Former Lilywhite Georgie Kelly plundered a hat-trick as Bohemians decimated shambolic Dundalk in the Dalymount sunshine on an evening both sides suffered dismissals.
This game was over as a contest after Kelly's second on 50 minutes, Tyreke Wilson having gotten Bohs' second, but the last-named gave the visitors some hope when he subsequently saw red.
However, Kelly made it safe with his third, before a fine Greg Sloggett strike made the scoreline a shade less humiliating for the visitors on 80 minutes, by which time Cameron Dummigan had also seen red.
Promise Omochere made it 5-1 with the last kick of the game.
Dundalk, who ended Shamrock Rovers' historic unbeaten run on Friday, were more like the rabble they've become here, but even the most staunch critic of the current Dundalk couldn't have envisaged how insipid they were.
Bohs just had to tog out, clock in and out and wonder, like us all, how a club with the money and playing talent Dundalk have could come to this.
Bohs opened the scoring when the ever-busy Ross Tierney ran onto a Liam Burt pass. He found Kelly who, having started the counter-attack, placed the ball nicely past a static Alessio Abibi.
It was 2-0 four minutes later, the classy Tyreke Wilson, having established himself as a regular starter now for Bohs, curling a beautiful free-kick into the top corner.
Burt has proved a terrific addition for the Gypsies and 20 minutes in, their swagger apparent, he drilled one wide with Abibi unlikely to have gotten down had it been on target.
Dundalk got on top then and really should have scored on the half hour. Patrick McEleney, who was hugely influential when in possession, struck a beautiful cross which David McMillan, unusually, made a mess of from close in.
In the next attack, Tierney forced Abibi to tip over somewhat theatrically. As expected, this was lively, as was Dawson Deboy on 34 minutes, his left-foot curler edging beyond Abibi but also his left-hand post.
After the hitherto anonymous Michael Duffy saw his free-kick curl wide, Burt played Kelly in on 50 minutes. Against the club he left last year, Kelly had a simple task to place beyond Abibi.
Bohs were reduced to 10 men shortly afterwards, with Wilson fouling Kelly and getting a second yellow. From the free-kick, Wilfred Zahibo missed a sitter of a header when looking offside. He was subsequently replaced.
Duffy failed to trouble Talbot and one sensed that Dundalk needed to score before the 70th minute to give themselves a chance.
Instead it was Kelly who scored again, heading home on 64 minutes from an Ali Coote free.
Dundalk had more shame to endure, Dummigan heading for the showers before even looking to see had he, indeed, seen yellow for the second time, having pulled back Burt with 16 minutes left.
Some feeble Dundalk attacks came to nothing, much like their season is headed on this sorry evidence, before Sloggett tried his luck from around 25 yards and left Talbot reeling.
Chris Shields could have seen red for kicking out at Burt with time running out. Shields is being linked with a move away from Dundalk, having lost his form this season. He's not alone.
Omochere faced no resistance to make it five in injury time.
Bohemians: Talbot; Feely, Kelly, Lyons, Wilson; Burt, Devoy, Coote, Levingston (Ward 76); Tierney (Breslin 53); Kelly (Omochere 72).
Dundalk: Abibi; Jurkovskis (Leahy 55), Boyle, Shields, Dummigan; Kelly, Stanton (Murray 66), Shields, McEleney, Zahibo (Sloggett 55); Kelly (O'Kane 75) , McMillan (Ogedi-Uzokwe 55), Duffy.
Referee: Ben Connolly