"We went from being in control and being in a position where we should have finished the game off to having our backsides spanked. We did this against Millwall on Sunday and got away with it, but I've got to get it into the lads' brains.
"We get on top, look good and comfortable yet for some reason it all seems too easy and we take our foot off the pedal. I'm angry because I've got some experienced players in there who should know better than that – and I let them know in no uncertain terms that wasn't good enough."
"We went from being totally in control, when we should have finished the game off, to ending up having our backsides smacked.
"So I am not happy at all."
Blackwell takes his Leeds side to Luton on Saturday to face the Hatters who have already beaten Crystal Palace and Southampton already.