Hull boss Peter Gentle slammed his players after their Super League top-four hopes were dealt a big blow with a shock 42-16 defeat at bottom club Widnes.
The Vikings ended a run of three defeats with their first win over the Airlie Birds in eight years.
Gentle said: "It was disgraceful and the most inept performance I have seen for a long time."
The Vikings ran in eight tries with Shaun Briscoe and Willie Isa each bagging a brace while Paddy Flynn also crossed on his 100th appearance for the club.
Briscoe was back after a six-match injury absence against his old club and made only his seventh appearance of a frustrating season but turned in an outstanding show.
Hull, who led 10-8 midway through the first half, made too many errors and Gentle said: "We got behind and panic set in. Our completion rate in the second half was only 39% and we went from bad to worse.
"We weren't anything like a top-four side out there and are kidding ourselves if we think that. We have a lot of work to do. We had no respect for the ball and no defence to back it up. It was embarrassing and not up to standard."
Widnes boss Denis Betts was full of praise for his players, and said: "We stuck to our task. Peter may be upset with his players but we got in their faces and forced them into errors. Hull could not break us down and we can take a lot out of that performance."
Betts paid tribute to Briscoe and said: "We miss Shaun when he's not playing. He gives us experience and talk. When he's out there I can hear him all over the field urging on his team-mates.
"Willie Isa has really contributed the last 10 or 12 weeks. He has a huge work ethic and his energy is infectious. Young Alex Gerrard also deserves credit. He has very limited Super League experience and made the hard yards. Paddy Flynn has also been chomping at the bit and took his chance well with Patrick Ah Van out."