Thornton Hibs recorded their biggest ever victory in The Derby with Garry Thomson inflicting most of the damage as he scored four goals and provided the assist for Raymond Crichton to net the other.
And yet it was Glenrothes who began the game on the front foot as they forced a number of corner-kicks before the deadlock was broken in the 8th minute at the other end. Matthew Robertson's deep cross found Andrew Adam at the back post and his lay off was perfect for Thomson to shoot low into the net.
Thomson doubled the Hibs' lead in the 15th minute when he headed home Shaun Keatings' corner-kick.
Callum Kinness made a superb goal-line clearance after Chris Ireland's header came back off the crossbar before Stanley Chitemere was presented with a decent chance to reduce the leeway but he shot weakly wide.
Thornton were reduced to ten men in the 34th minute after Ian Shanks was deemed to have denied John Martin a goal-scoring opportunity but this didn't appear to hinder Craig Gilbert's side as Garry Thomson netted the third (his 150th goal for the club) in the 44th minute after great wing play from Ben Anthony.
Early in the second-half Thomson looked odds on to make it four only to be foiled by a terrific goal-line clearance from left-back, Stevie King.
Glenrothes defender, Gary Pearson, received a second yellow card in the 67th minute to further hamper his side's hopes of a comeback and by the 80th minute the gap had been increased to four goals with Thomson turning provider to allow Raymond Crichton to shoot low past Brandon Connor.
Two minutes later Garry Thomson completed the scoring after being set up by Andrew Adam but this wasn't the last incident of note as Adam received a second yellow card in the 86th minute for protesting too fiercely after the referee didn't award a 'goal' when Thomson's header struck the post before appearing to have crossed the line.
SM Electrical Services Hibs' Man of the Match: Garry Thomson
Glenrothes: Connor, Kinness, King, Napier, Pearson, Hynd, L.Schiavone, C.Schiavone, Martin, Chitemere, Celentano. Subs: Harley, Keenan, Smith.
Thornton Hibs: Warrender, Robertson, A.Drummond, Shanks, Millar, Adam, Keatings, Hepburn, Ireland, Thomson, B.Anthony. Subs: Shields, Coleman, Crichton, McMillan, Costello.
Referee: Mr J. Bell
Match statistics:
Attempts at goal - Gl 6 TH 13
Attempts on target - Gl 2 TH 8
Corners - Gl 4 TH 8
Offside - Gl 7 TH 0
Fouls committed - Gl 11 TH 12
Yellow Cards - Gl 5 TH 3
Red Cards - Gl 1 TH 2