Sebastian Vettel was shocked to qualify only ninth for the Belgian Grand Prix, on a miserable day for Ferrari after Kimi Raikkonen was knocked out in Q2.
Vettel qualified ninth, but should start eighth due to Romain Grosjean's five-place grid penalty.
When asked what happened on his Q3 lap, Vettel replied: "Not much. I didn't go off, so it was a normal lap.
"I was a little bit deep into the last corner, but, yeah, surprised as well that obviously it was only good enough for ninth.
"We just couldn't make the step from Q2 to Q3. It was a tight pack, so we went from being just in front to behind. That's what happened."
Disaster for Raikkonen too
Ferrari's misery was compounded by Kimi Raikkonen failing to complete a flying lap in Q2 when his car ground to a clunky, engine-related halt at Stavelot.
The first report from Ferrari was that there was a drop in oil pressure which heralded the failure.
"Problem with the power unit and I had to stop," said Raikkonen. "I lost drive, I felt I had to stop. Once they get the car back we'll see what happens."
Raikkonen also received a reprimand for his driving in FP3, when he caused Romain Grosjean to take evasive action following a constant-speed test while staying on the racing line.