Marcus Tudgay made amends for conceding a penalty by scoring the winner for Sheffield Wednesday against Norwich.
The visitors took the lead when Tudgay brought down Wes Hoolahan in the area and Sammy Clingan scored from the spot.
But Tony McMahon headed in Etienne Esajas' corner to equalise before Leon Clarke fired in a loose ball at 2-1.
A low shot from Leroy Lita levelled it again only for Tudgay to head in Lewis Buxton's cross before Norwich's Jon Kennedy was shown a straight red card.
Sheffield Wednesday boss Brian Laws:
"We were rubbish in the first half - we were not on our game.
"I was so glad to get them in at half-time and give out some rollickings - I wanted a reaction, we got one and began to play the way we're capable of.
"It was chalk and cheese between the two halves but in the end we thoroughly deserved to win."
Norwich manager Glenn Roeder told BBC radio Norfolk:
"I don't think I've been involved in a game where a performance by one team is so different between the two halves.
"We were brilliant in the first half, there wasn't anything Sheffield Wednesday could do about our performance in the first half.
"One of the last things I said to my players before they went back out was that (Sheffield Wednesday manager Brian) Laws would have given them a hell of a telling-off, they were that poor in the first half," he said.
"I said that in the first 10 or 15 minutes of he second half whatever tempo they start at, that we had to match it - but we didn't."
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