Max Verstappen had no explanation for the mistake which saw him lose pole position at the Saudi Grand Prix.
Verstappen seemed to have pole in the bag with a lap that was right on the limit at the end of qualifying, including a near miss with the wall at Turn 2.
He was over 0.2s up on title rival Lewis Hamilton when he locked up and hit the wall at the final corner in what one of the most dramatic moments of the season so far.
Verstappen will start Sunday's race from third, behind Hamilton and Valtteri Bottas, unless the crash has damaged his gearbox.