Newcastle coach Steve Bruce compared his side's defending to "something you see on a park on a Sunday" after they conceded three times in the last 13 minutes to lose 5-2 at Leeds.
Having seen off Crystal Palace and West Brom this month, the Magpies were chasing a third successive win for the first time since November 2018 but they imploded in the closing stages at Elland Road.
Ciaran Clark had headed them level, exposing Leeds' set-piece fragilities, but Newcastle midfielder Sean Longstaff dithered on the ball in his own area, leading to Stuart Dallas putting the hosts ahead again after 77 minutes.
The visitors were then caught twice on the counter in the last five minutes as Ezgjan Alioski finished well before Jack Harrison spectacularly found the top corner from 25 yards, much to the chagrin of Bruce.
"Up until 75 minutes I thought we were comfortable. I thought we looked a threat when we equalised," he said. Of course Leeds are always going to ask you questions the way they play, they do it very well, but we've gifted them the two or three goals at the end. Unfortunately they're something which you see on a park on a Sunday.
"We can't make those mistakes we've made here. The third goal in particular where we gave the ball away cheaply in our own box. You get punished for things like that at this level.
"At the wrong time we've given away poor goals, not defended well enough and got punished. It's unacceptable."
Bruce refused to hide behind Newcastle's recent coronavirus crisis, with several of his players still unavailable after contracting the disease, although he feels his side were denied a clear penalty with the score at 1-1.
Leeds captain Liam Cooper came through the back of Callum Wilson, seeming to make no contact with the ball, and even though the incident was checked by the video assistant referee, no spot-kick was given.
Bruce said: "I honestly was all for VAR when they brought it in to make sure the clear and obvious mistakes that the referee misses, that's what the VAR is there for.
"If anybody looks at the challenge you understand that it's a clear penalty. We might not have gone on to win the match but certainly when you take the lead in the Premier League then the outcome could be very, very different.
"I'll leave it to other people to judge."
Leeds fell behind when Jeff Hendrick put the finishing touch to Wilson's flick-on from the fit-again Ryan Fraser's cross, but headers from Patrick Bamford and Rodrigo put Leeds ahead.
Clark headed home from a corner to level matters but the hosts were well worth their win after a barnstorming finish as they leapt above their opponents and moved up to 13th in the Premier League.
Leeds head coach Marcelo Bielsa said: "It was a deserved victory. In both halves we attacked a lot and created plenty of chances but in the second half we were more efficient.
"The team carried on playing in a calm and organised manner after they levelled the game and eventually we were able to get on top of them again and get on top of them when we needed to."
More on Quran memorisation:
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'Laal Kaptaan'
Director: Navdeep Singh
Stars: Saif Ali Khan, Manav Vij, Deepak Dobriyal, Zoya Hussain
Rating: 2/5
Mohammed bin Zayed Majlis
UAE currency: the story behind the money in your pockets
Results
International 4, United States 1
Justin Thomas and Tiger Woods (US) beat Marc Leishman and Joaquin Niemann (International) 4 and 3.
Adam Hadwin and Sungjae Im (International) beat Xander Schauffele and Patrick Cantlay (US) 2 up.
Adam Scott and Byeong Hun An (International) beat Bryson DeChambeau and Tony Finau (US) 2 and 1.
Hideki Matsuyama and C.T. Pan (International) beat Webb Simpson and Patrick Reed (US) 1 up.
Abraham Ancer and Louis Oosthuizen (International) beat Dustin Johnson and Gary Woodland (US) 4 and 3.
The Voice of Hind Rajab
Starring: Saja Kilani, Clara Khoury, Motaz Malhees
Director: Kaouther Ben Hania
Rating: 4/5
Zayed Sustainability Prize
GAC GS8 Specs
Engine: 2.0-litre 4cyl turbo
Power: 248hp at 5,200rpm
Torque: 400Nm at 1,750-4,000rpm
Transmission: 8-speed auto
Fuel consumption: 9.1L/100km
On sale: Now
Price: From Dh149,900
Zayed Sustainability Prize
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AI traffic lights to ease congestion at seven points to Sheikh Zayed bin Sultan Street
The seven points are:
Shakhbout bin Sultan Street
Dhafeer Street
Hadbat Al Ghubainah Street (outbound)
Salama bint Butti Street
Al Dhafra Street
Rabdan Street
Umm Yifina Street exit (inbound)
Avengers: Endgame
Directors: Anthony Russo, Joe Russo
Starring: Robert Downey Jr, Chris Evans, Scarlett Johansson, Chris Hemsworth, Josh Brolin
4/5 stars
UAE currency: the story behind the money in your pockets
RACE RESULTS
1. Valtteri Bottas (FIN/Mercedes) 1hr 21min 48.527sec
2. Sebastian Vettel (GER/Ferrari) at 0.658sec
3. Daniel Ricciardo (AUS/Red Bull) 6.012
4. Lewis Hamilton (GBR/Mercedes) 7.430
5. Kimi Räikkönen (FIN/Ferrari) 20.370
6. Romain Grosjean (FRA/Haas) 1:13.160
7. Sergio Pérez (MEX/Force India) 1 lap
8. Esteban Ocon (FRA/Force India) 1 lap
9. Felipe Massa (BRA/Williams) 1 lap
10. Lance Stroll (CAN/Williams) 1 lap
11. Jolyon Palmer (GBR/Renault) 1 lap
12. Stoffel Vandoorne (BEL/McLaren) 1 lap
13. Nico Hülkenberg (GER/Renault) 1 lap
14. Pascal Wehrlein (GER/Sauber) 1 lap
15. Marcus Ericsson (SWE/Sauber) 2 laps
16. Daniil Kvyat (RUS/Toro Rosso) 3 laps
Farage on Muslim Brotherhood
Nigel Farage told Reform's annual conference that the party will proscribe the Muslim Brotherhood if he becomes Prime Minister.
"We will stop dangerous organisations with links to terrorism operating in our country," he said. "Quite why we've been so gutless about this – both Labour and Conservative – I don't know.
“All across the Middle East, countries have banned and proscribed the Muslim Brotherhood as a dangerous organisation. We will do the very same.”
It is 10 years since a ground-breaking report into the Muslim Brotherhood by Sir John Jenkins.
Among the former diplomat's findings was an assessment that “the use of extreme violence in the pursuit of the perfect Islamic society” has “never been institutionally disowned” by the movement.
The prime minister at the time, David Cameron, who commissioned the report, said membership or association with the Muslim Brotherhood was a "possible indicator of extremism" but it would not be banned.
The specs: 2018 Chevrolet Trailblazer
Price, base / as tested Dh99,000 / Dh132,000
Engine 3.6L V6
Transmission: Six-speed automatic
Power 275hp @ 6,000rpm
Torque 350Nm @ 3,700rpm
Fuel economy combined 12.2L / 100km