Full-back Wayne Bridge scored his first league goal in almost nine years to help Brighton beat Barnsley and secure the Seagulls' first win of the season.
Former England international Bridge struck from 25 yards after Ashley Barnes had netted the home side's first goal of the new season.
Craig Davies pulled one back from the penalty spot against his former club.
But a Craig Mackail-Smith double and a further strike from Barnes consigned Barnsley to a second straight defeat.
It was an emphatic way for Brighton to end a four-game goal drought stretching back to a 1-1 draw with Birmingham in April.
The deadlock was broken when Barnes picked up the scraps after Tykes keeper David Gonzalez spilled Craig Noone's free-kick.
And 32-year-old Bridge, on loan from Premier League champions Manchester City, doubled the lead with his first league goal since he scored for Chelsea in a 3-0 win over Portsmouth in December 2003.
The Bridge league goal drought
Before this game, Wayne Bridge's last league goal came for Chelsea in December 2003. However, he netted against Arsenal in a Champions League tie in April 2004, and then found the net for England in a 6-1 win over Iceland in June 2004, before scoring against Wycombe in the Carling Cup in January 2007
Barnsley were handed a lifeline when Davies converted from the spot after Andrew Crofts brought down Jacob Mellis in the area.
But Mackail-Smith put the tie beyond doubt with strikes from a Bruno Saltor cross and a Noone centre, before Barnes finished the rout by firing in Kazenga LuaLua's cutback.
Brighton boss Gus Poyet: "We are much more aggressive and more dangerous going forward but we need to be solid as well. The key to it is to produce clean sheets.
"Everything went our way and Barnsley were the ones to pay. Unfortunately for Barnsley they paid the price, they were an unlucky team coming up against us because everything went in our favour."
Barnsley manager Keith Hill: "We had 12 players out but I have no excuses whatsoever. It was inept and I include myself in that.
"The opposition were excellent and it could have been up to 10-1. Hopefully we will learn and grow stronger."
Brighton & Hove Albion
- 29 Kuszczak
- 02 Bruno
- 03 Greer
- 06 El-Abd
- 28 Bridge
- 08 Crofts (Harley - 70' )
- 11 Noone (LuaLua - 70' )
- 18 Dicker
- 26 Bridcutt
- 09 Barnes Booked (Agdestein - 84' )
- 12 Mackail-Smith
- 16 Ankergren
- 05 Dunk
- 14 Calderon
- 17 Harley
- 25 LuaLua
- 23 Agdestein
- 33 Barker
- 22 Gonzalez
- 03 Golbourne Booked (Cranie - 55' )
- 06 Foster Booked
- 14 Wiseman
- 34 Stones Booked (Hassell - 55' )
- 07 Dawson
- 19 Cywka
- 21 Mellis
- 09 Davies
- 16 Harewood
- 23 Etuhu
- 30 Lidakevicius
- 02 Hassell
- 05 Collins
- 25 Cranie
- 13 Dagnall
- 31 Clark
- 32 Rose
Live Text Commentary
Full Time The referee brings the game to a close.90:00 +1:39
Foul by Liam Bridcutt on Craig Davies, free kick awarded. Free kick taken by Scott Wiseman.89:49
Close range headed effort by Ryan Harley misses to the right of the goal.88:47
Inswinging corner taken from the left by-line by Craig Davies.87:35
Kazenga LuaLua produces a right-footed shot from inside the area that goes over the bar.85:39
Craig Davies takes a shot. Comfortable save by Tomasz Kuszczak.83:17 Substitution
Substitution Torbjorn Agdestein is brought on as a substitute for Ashley Barnes.80:41
Kazenga LuaLua provided the assist for the goal.80:41 Goal scored
Goal! - Ashley Barnes - Brighton 5 - 1 Barnsley Ashley Barnes scores a goal from inside the penalty area to the top left corner of the goal. Brighton 5-1 Barnsley.77:43
Outswinging corner taken right-footed by Kazenga LuaLua, Jacob Mellis makes a clearance.76:20
Jacob Mellis crosses the ball from the free kick right-footed from left channel.76:20 Booking
Booking Booking for Ashley Barnes.76:09
Free kick awarded for an unfair challenge on Craig Davies by Ashley Barnes.75:30
Kazenga LuaLua is ruled offside. Bobby Hassell takes the free kick.68:39 Substitution
Substitution Kazenga LuaLua is brought on as a substitute for Craig Noone.68:39 Substitution
Substitution Ryan Harley replaces Andrew Crofts.68:39
Wayne Bridge takes the direct free kick.68:39 Booking
Booking Booking for Stephen Foster for unsporting behaviour.68:34
Ashley Barnes fouled by Stephen Foster, the ref awards a free kick.67:11
Corner from right by-line taken by Jacob Mellis.
Free kick awarded for a foul by Craig Mackail-Smith on Bobby Hassell. Free kick taken by Bobby Hassell.60:07
Effort on goal by Jacob Mellis from long distance goes over the crossbar.56:54
Wayne Bridge takes a shot. Blocked by Bobby Hassell.54:08 Substitution
Substitution Bobby Hassell on for John Stones.54:08 Substitution
Substitution Martin Cranie replaces Scott Golbourne.53:00
Outswinging corner taken by Craig Noone, clearance made by John Stones.49:25
Ashley Barnes provided the assist for the goal.49:25 Goal scored
Goal! - Craig Mackail-Smith - Brighton 4 - 1 Barnsley Craig Mackail-Smith scores a goal from inside the six-yard box to the bottom right corner of the goal. Brighton 4-1 Barnsley.48:31
Craig Noone delivers the ball, Ashley Barnes takes a shot.45:01
The game restarts for the second half.45:00 +3:39 Half time
Half Time The whistle is blown to end the first half.45:00 +2:34
Jacob Mellis takes a shot. Save by Tomasz Kuszczak. Inswinging corner taken right-footed by Jacob Mellis, clearance made by Andrew Crofts.45:00 +1:29
Effort from the edge of the penalty box by Marlon Harewood goes wide of the right-hand upright.37:46
Ashley Barnes provided the assist for the goal. Ashley Barnes fouled by John Stones, the ref awards a free kick. Craig Noone restarts play with the free kick.37:46 Goal scored
Goal! - Craig Mackail-Smith - Brighton 3 - 1 Barnsley Craig Mackail-Smith grabs a goal from the edge of the penalty area low into the middle of the goal. Brighton 3-1 Barnsley.35:33
A cross is delivered by Saltor Bruno, Ashley Barnes takes a shot.34:37 Goal scored
Goal! - Craig Davies - Brighton 2 - 1 Barnsley Craig Davies scores a power penalty. Brighton 2-1 Barnsley.33:46
Foul by Andrew Crofts on Jacob Mellis, Penalty awarded.32:38
Stephen Dawson concedes a free kick for a foul on Liam Bridcutt. Direct free kick taken by Saltor Bruno.32:06
Effort by Craig Davies from a long way out goes over the crossbar.28:53
Andrew Crofts produces a right-footed shot from long range that goes harmlessly over the bar.27:07
The assistant referee signals for offside against Craig Mackail-Smith. David Gonzalez takes the free kick.26:35 Booking
Booking Caution for John Stones.26:03
Free kick awarded for a foul by John Stones on Wayne Bridge. Free kick taken by Craig Noone.23:12
Tomasz Cywka takes a shot. Tomasz Kuszczak makes a save. Corner taken by Scott Golbourne from the left by-line, clearance by Ashley Barnes.18:05
Stephen Foster concedes a free kick for a foul on Craig Mackail-Smith. Direct free kick taken by Liam Bridcutt.13:13
Assist on the goal came from Liam Bridcutt.13:13 Goal scored
Goal! - Wayne Bridge - Brighton 2 - 0 Barnsley Wayne Bridge finds the net with a goal from long distance to the bottom right corner of the goal. Brighton 2-0 Barnsley.8:34
Inswinging corner taken left-footed by Craig Noone from the right by-line to the near post, Craig Davies makes a clearance.6:46
Outswinging corner taken left-footed by Craig Noone played to the near post.3:21
Assist on the goal came from Craig Noone. Save by David Gonzalez.3:21 Goal scored
Goal! - Ashley Barnes - Brighton 1 - 0 Barnsley Ashley Barnes fires in a goal from close in high into the middle of the goal. Brighton 1-0 Barnsley.2:09
The free kick is swung in left-footed by Craig Noone,2:09 Booking
Booking Scott Golbourne goes into the referee's book.1:54
Foul by Scott Golbourne on Craig Noone, free kick awarded.0:00
The match gets underway.
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