A mad couple of minutes in the middle of the first half did for the Owls, when sluggish passing and a buoyant Barnsley combined to stick the Tykes 2-0 to the good.
Here, plenty of teams - even those top of the league and unbeaten in half a season - can go under. But not this Wednesday side. To fight back to 2-2 and go behind again only to a fiercely unlucky Max Watters goal showed the sort of gumption that wins promotions.
A fourth Barnsley goal at the death rubbed salt in the wounds. Here are our ratings as Wednesday fell the wrong side of a thriller at Oakwell.
A fourth Barnsley goal at the death rubbed salt in the wounds. Here are our ratings as Wednesday fell the wrong side of a thriller at Oakwell.