Jonathan Hogg came off the bench to net a dramatic late winner as Huddersfield Town maintained their flying start to the Championship campaign at the expense of neighbours Barnsley.
It's 10 points from four games for David Wagner's table-topping side after Hogg shot home from Elias Kachunga's pass two minutes into time added on in front of 20,001 at the John Smith's Stadium.
German left-back Chris Lowe notched his first Town goal in the 27th minute, but the visitors replied with Alfie Mawson's header early in the second half.
Town then had a huge let-off when Dean Whitehead's miscued back pass let in Stefan Payne one in one with keeper Danny Ward, but the Barnsley substitute shot against the outside of a post.
WATCH: Huddersfield Town players celebrate with their fans after a dramatic derby day victory over Barnsley
5mins: Tommy Smith's cross is spilled by Barnsley keeper Adam Davies, but Josh Scowen clears as Sean Scannell lurks.
6mins: Elias Kachunga's shot is parried by Davies.
8mins: Barnsley's Marley Watkins advances only to drive the ball wide.
15mins: Town old boy Adam Hammill works his way into the area, the ball falls into the path of Ryan Kent, but he shoots over.
16mins: Scowen heads too high from Marc Roberts' long throw.
27mins: Town take the lead as the advancing Lowe plays a neat one-two with Kachunga and lifts the ball over keeper Davies.
30mins: Smith bends an effort just wide.
39mins: Rajiv van La Parra's low shot is held.
45+1mins: Conor Hourihane's awkward curling cross is pushed away by Town keeper Danny Ward.
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47mins: Barnsley are level as Alfie Mawson heads home another long throw by fellow centre-back Roberts.
52mins: Ward saves low down from Kent.
60mins: Wells' header from a Lowe cross is well saved by Davies.
62mins: Kent' curler looks goalbound, but Ward saves.
66mins: Lowe tees up Kachunga with a neat cross but the Town man hooks his shot.
67mins: Van La Parra fires narrowly over.
69mins: Kasey Palmer plays in Wells, but his shot on the turn is held by Davies.
80mins: Huge escape for Town as Dean Whitehead's miscued back pass lets in Stefan Payne, whose shot hits the outside of a post.
90mins: Harry Bunn's shot is tipped over.
90+2mins: Jonathan Hogg nets a dramatic winner from just inside the area.
Town: Ward, Smith, Hudson, Schindler, Lowe, Whitehead, Mooy (Hogg, 56), Scannell (Palmer, 56), Kachunga, Van La Parra, Wells. (Bunn, 76).
Subs not used: Cranie, Payne, Hefele, Coleman.
Barnsley: Davies, Bree (Yiadom, 77), Roberts, Mawson, White, Kent (D'Almeida, 67), Scowen, Hourihane, Hammill, Watkins, Bradshaw (Payne, HT).
Subs not used: MacDonald, Moncur, Lee, Townsend.Referee: Chris Kavanagh (Manchester).