"It's a joke. At this level you shouldn't concede goals like that.
"That's four goals in the last four games that have been absolutely farcical.
"The two at Blackpool were a disgrace but that second one topped it off."
Forest manager Colin Calderwood said: "A win on the back of a good performance is a nice reward.
"It was no better a performance than I've seen in five or six other games but we got a goal in a decent period.
"Then when it was 1-1 we had better opportunities than they had.
"We have not had one game where we have looked like a side that might go down."