AA review of Saturday's action in the Sky Bet Championship, as Burnley return to the top with a win over Barnsley.
The Clarets were third at the start of the day and Kightly's 65th-minute strike at Turf Moor, along with results around them, ensured they took the second-tier lead once more on goal difference ahead of QPR.
Barnsley, who are looking for a successor to David Flitcroft, almost stole a point when Tomasz Cywka stepped up to take a free-kick but goalkeeper Tom Heaton produced a fine save to keep Burnley in front.
Ashley Barnes scored twice and Craig Conway hit the other at the Amex Stadium as the Foxes, who netted through Andy King, slipped to their second successive defeat.
Harry Redknapp's side dropped points at home for only the second time this season and are now behind new leaders Burnley on goal difference.
Isaiah Osbourne headed Blackpool in front early on but that was as good as it got for Paul Ince's side, whose indiscipline continued as they finished the game with nine men.
Even with the early goal, the Seasiders led a charmed life for the remainder of the first half.
Their luck ran out after half-time though as Derby hit three quickfire goals to turn the game on its head.
A Chris Martin double, the first a penalty, and another effort from Craig Bryson put the Rams in control by the 57-minute mark.
Former Norwich striker Martin, in his first full season with Derby following a loan spell during the last campaign, took his tally for this season to 13 goals as he completed his treble with another spot-kick - an incident which saw Neal Bishop sent off.
Substitute Angel Martinez then also saw red for the visitors before captain Richard Keogh completed the rout in injury time.
Simon Cox's fifth goal of the season was enough to steer Nottingham Forest into the top six as they secured a 1-0 win over managerless Sheffield Wednesday at Hillsborough, while Reading's unbeaten nine-match home run came to an abrupt end as they suffered a shock 2-1 defeat to lowly Bournemouth at the Madejski Stadium.
Troy Deeney equalised with four minutes to go as Watford got a 3-3 draw at Leeds in a game they appeared to have thrown away.
Gianfranco Zola's men had not won in seven before the clash, but appeared set to change when they took a 2-0 lead into the break thanks to goals from Deeney and Christian Battocchio.
Leeds - on a run of five straight home wins - roared back at them, though, and with 12 minutes left were ahead thanks to a thrilling comeback started by Danny Pugh, extended by Matt Smith and finished by the in-form Ross McCormack.
But there was still time for more drama as Deeney cashed in after Paddy Kenny failed to deal with George Thorne's long-range grass-cutter.
Daryl Murphy headed home a dramatic winner to cap a perfect week for Ipswich and beat unlucky Huddersfield 2-1 at Portman Road and Uwe Rosler was given an indication of how hard his job at Wigan will be as he watched from the stands as his new charges fell to a 2-1 defeat against Millwall at the New Den.
Scotland international Chris Burke showed his value to Birmingham as he inspired a spirited fightback that secured a 2-2 draw with Middlesbrough, while Joe Mason and Andre Moritz's first-half goals helped fire Bolton to a comfortable victory 3-0 over Doncaster.
Elsewhere, Yeovil pulled off a superb second-half comeback to secure a spirited 2-2 draw with 10-man Charlton.