It was a weird game of football, with Wednesday probably edging the tie for over an hour, but after Matthew Pearson opened the scoring it all went to pieces. Over the space of 12 minutes Danny Röhl's side were knocked to the canvas, and it's a result that has hit their survival hopes hard.
Two goals from Josh Koroma either side of Sorba Thomas' strike put paid to Wednesday getting anything out of this one - and they now find themselves eight points adrift of their Yorkshire rivals.
Here's how we rated the Owls on a horrific afternoon at the John Smith's Stadium:
9. Anthony Musaba - 4
Another persevering display by the winger, but never really seemed to get into things the way he would've wanted. It was his man that opened the scoring - though it was a bit of a mismatch. Came off at 2-0 and cut a frustrated figure. | UGC / Steve Ellis
10. Michael Smith - 4
Worked tirelessly up top and battled for everything. Wasn't always able to get it to stick but brought others into play nicely on a number of occasions. Couldn't affect things enough on the day. | UGC / Getty Images
11. Iké Ugbo - 5
The attacker started really brightly and could've opened the scoring early doors if not for an important Tom Lees touch. Wasn't able to maintain the same intensity as the game but it was another solid outing, though, and was replaced by Cadamarteri at 0-0. | UGC / Steve Ellis
12. Bailey Cadamarteri - 5
Was brought on with Wednesday chasing the game, but within seven minutes they were 3-0 down before he'd even had a chance to tough the ball much. Tough circumstances for the teenager. | Steve Ellis / UGC