"I've been at Newcastle a long time and know how it works," he told the Mirror.
"Ten days ago we had statistically the best start in 11 years and everyone was thinking 'three points at Reading is two points a game - top-six form or top-four even'.
"Two very, very disappointing performances later and its crisis time. That's Newcastle United. We have to put the last two games to bed. We have to put on a performance for us, the manager, the fans.
"It's a rollercoaster. This is the way it is here. It's either everything is rosy or it's crisis time. There's never any middle ground.
We're either qualifying for Europe or the manager is under pressure. Come Saturday if we've won everything will be rosy again. I can't even think about losing the game."