He darted right and clipped his rear wheel on the front wheel of another car. The frame by frame analysis suggests he may have been avoiding debris. It was quite a hectic start.
Not sure as he seemed to turn into the debris on the slo mo

It looked to me that he was slightly faster than the 3 in front and had nowhere to go left, so tried to go right around Magnusson but it was quite a sharp turn across. He either misjudged or didn't see the AT behind him