Hibernian boss Pat Fenlon was furious with his team's second-half showing in the 2-0 defeat to Dundee United.
Johnny Russell netted after 65 minutes before putting Gary Mackay-Steven through for the second as the visitors extended their unbeaten run in the Clydesdale Bank Premier League to eight matches.
Fenlon has numerous concerns after Dunfermline's 1-1 draw with St Mirren saw the capital club's advantage at the foot of the table cut to three points with seven games remaining.
He said: "It's probably the reverse of last week (when Hibs lost 2-0 at Hearts) where we didn't perform in the first half and did well in the second half.
"We've turned that on its head this week where we've done all right in the first half and been non-existent in the second half.
"We concede the first goal, get very nervous and very edgy. We go to pieces a little bit."