Debutant Dominic Iorfa grabbed an equaliser 10 minutes into added time and then Fernando Forestieri was sent off as Wednesday salvaged an extremely fortunate point from a poor display at Rotherham.
All looked lost for us at 2-1 down but, after a long hold-up for a head injury to Jordan Thorniley in the 90th minute, the referee signalled eight minutes of added time.
This had then stretched to just under 10 minutes when Forestieri saw his long-range effort turned away by home keeper Marek Rodak and, when the resulting corner came over, the ball bounced around inside the penalty box before Iorfa, who had come on for his Owls debut as sub for the injured Thorniley, forced the ball home.
More drama followed moments later when Forestieri was shown a yellow card for what was described as over exuberant celebrations with the Wednesday fans behind the goal.
Forestieri had given us the lead on 35 minutes, drilling the ball home from inside the box after a good move between George Boyd and Adam Reach.
The latter had already hit a post when he should have scored but Rotherham had also missed two excellent opportunities and it was no surprise when they were back on level terms within two minutes of our opener, Jon Taylor firing home past Keiren Westwood.
Buoyed by the equaliser, the home side dominated the second period and wasted more opportunities before Hector made an error with a headed clearance and Richie Towell took full advantage to give the home side a deserved 2-1 lead 16 minutes from time.
At the other end, we struggled to create any decent openings and it looked certain to be Steve Bruce’s first defeat as boss before Iorfa struck that equaliser in the 100th minute, the point lifting us one place into 15th spot.
Westwood, Palmer, Hector, Thorniley (Iorfa 90), Fox, Reach, Hutchinson, Bannan, Boyd (Aarons 75), Joao (Fletcher 57) Forestieri. Att: 11,736 (2625 Wednesdayites).