When did the wheels fall off for previous Premier League surprise packages?
Six defeats in seven have Brentford anxiously looking over their shoulders. They’re not the first newly promoted club to see their bubble burst as the harsh realities of top-flight football kick in.
However, since Christmas, Thomas Frank's side have lost six in seven and now lie 14th and uncomfortably close to the bottom three who all hold games in hand - Burnley have five.
But where did it go wrong for those four teams? Planet Sport looks back on the seasons in which the quartet made landmark returns to the top tier (or in Hull's case a first appearance) and looks at when the wheels started to fall off. We may even be able to pinpoint a date.
Hull City 2008/09 season
The sixth of those wins, a 3-0 success at West Brom, saw Hull City go joint top of the table alongside Liverpool and Chelsea and put them five points clear of eventual champions Manchester United.
It couldn't, and wouldn't, last. They won just twice more all season and escaped relegation on a nervy final-day, with Damian Duff deflecting home a shot from Aston Villa's Gareth Barry to condemn Newcastle to the drop.
Date when it started to go wrong: December 20, 2008 - losing at home to Sunderland
Burnley 2009/10 season
Robbie Blake and Brian Jensen were the heroes as Burnley beat champions Manchester United in their first home top-flight game for 33 years.
Blake's explosive volley put the home side ahead but it would need a Jensen penalty save - from Michael Carrick - and a typically resolute rearguard action from the hosts to keep the Red Devils at bay.
However, after beating Hull City at the end of October, Burnley went 12 games without a win.
Manager Owen Coyle departed on January 5, lured to fellow top-flight side Bolton and Brian Laws came in to replace him.
It was as if Burnley had already accepted their fate. Burnley were relegated in 18th, five points adrift of safety (six with their massively inferior goal difference).
Date when it started to go wrong: November 7, 2009 - failing to hold on to a two-goal lead at Manchester City
Blackpool 2010/11
A 2-0 win over Newcastle, courtesy of a Charlie Adam penalty and a DJ Campbell goal, lifted them up to fourth and the goals continued to flow as Blackpool's slick passing game and cavalier approach caught the top flight unawares.
Date when it started to go wrong: January 15, 2011 - losing to a late Peter Odemwingie goal at West Brom
Huddersfield Town 2017/18
With an astute array of signings, including Australian international Aaron Mooy, an £8million capture from Manchester City, Town hit the ground running.
The highlight of their start was a 2-1 win over Manchester United on October 21, with goals from Mooy and Laurent Depoitre earning them their first win over the Red Devils in 65 years.
Wagner was even linked with the Arsenal job, such was the regard he was held in (and not because he was friends with Jurgen Klopp).
Eleventh after a 4-1 win over Watford on December 16, the Terriers would go on to win just three of their remaining 17 top-flight games to limp in 16th, just four points above the drop zone.
That they were only able to call on influential winger Elias Kachunga twice more after the Hornets game was undoubtedly a factor in their slide. The DR Congo international suffered ligament damage in the Watford win and fought his way back to fitness only to suffer an ankle injury two games into his comeback.
🤕 After a scan, it's confirmed @ekachunga15 will miss the rest of the @premierleague season due to ankle ligament damage from a tackle at @NUFC
— Huddersfield Town (@htafc) April 2, 2018
Reaction from #htafc Head Coach David Wagner ▶️ https://t.co/WRf6bUZXb2
All the best with the recovery, Kache #teamkaching (DTS) pic.twitter.com/Rcd3BSMqFg
Date when it started to go wrong: December 16, 2017 - losing Elias Kachunga to a long-term injury