Alpine's Jack Doohan suffered a high-speed crash as Friday practice at the Japanese Grand Prix was punctuated by four red-flag stoppages.
The Australian was uninjured in the crash, which was caused because Doohan failed to shut the DRS overtaking aid, which meant the car had less grip than he expected as he entered the 160mph first corner.
Team principal Oliver Oakes said it had been a "misjudgement" and "something to learn from".
Doohan's was the first of four incidents that led to the session being stopped, two of which were for the grass catching fire beside the track.
McLaren's Oscar Piastri ended up fastest from team-mate Lando Norris.
The second stoppage was caused when Aston Martin's Fernando Alonso spun off and became beached in the gravel at Degner One, shortly after the session was restarted following a 20-minute delay to repair the damage to the barriers at Turn One.
And a few minutes after the session was resumed, the cars had to return to the pits when the grass caught fire between Dunlop and Degner One.
That left only seven minutes of running at the end of the session, but it was stopped after six when a bigger patch of grass caught fire on the run down to Spoon Curve.
The fires are believed to have been caused by a combination of sparks from the cars and dry grass - Japan's wet season is in the summer.
Welcome along to our coverage of qualifying day for the Japanese Grand Prix.
As just mentioned over 30 minutes were lost in second practice yesterday after Jack Doohan crashed heavily, Fernando Alonso ended up beached in the gravel and the grass on the edge of the track twice caught alight from sparks from under cars.
Teams will be hoping today's final practice, which gets under way at 3:30 BST, is free of such incidents to help ensure they are as ready as they can be for when the proper stuff gets under way.
