Rampant Wrexham came away from Hillsborough with the scalp of weakened Coca-Cola Championship side Sheffield Wednesday in the first round of the Carling Cup.
The in-form Welshmen from League Two were good value for their win, effervescent strike partnership Neil Roberts and Chris Llewellyn doing the damage with first-half goals while Matty Done and the superb Mark Jones added more after the break.
They remain unbeaten in five games this season while a disappointing Wednesday, for whom Glenn Whelan scored a 78th minute consolation, are left to concentrate on league matters.
Elsewhere, Paul Reid scored the only goal of the game at the Withdean Stadium as Brighton reached the next round at the expense of their League Two opponents Boston.
Chesterfield defeated Wolves on penalties at the Recreation Ground, with Kevan Hurst scoring the winning penalty after a goalless draw after extra-time. Joey Craddock had missed for the Championship side.
Port Vale also produced a shock, defeating Preston 2-1 thanks to a late winner from Leon Constantine after North End midfielder Simon Whaley had cancelled out Akpo Sodje's opener.
Southampton cruised into the next round after beating Yeovil 5-2 at St Mary's, with Chris Cohen's own goal and further strikes from Rudi Skacel, Bradley Wright-Phillips, Nathan Dyer and Kenwyne Jones. Wayne Gray and Matt Harrold scored for the visitors.
Norwich defeated Torquay 2-0 at Plainmoor, with their goals coming from Dickson Etuhu and Leon McKenzie.