McLaren driver Oscar Piastri was "shocked and surprised" by his pre-race crash that left him unable to take the start of Formula 1's Australian Grand Prix as he received an unexpected power spike from his engine.<br>Around 40 minutes before the race, Piastri left the garage for the usual reconnaissance laps to the grid as teams conduct their final checks. But coming out of the Turn 4 left-hander ...<a class='more' href='https://www.autosport.com/f1/news/piastri-explains-cause-of-australian-gp-pre-race-crash/10803288/?utm_source=RSS&utm_medium=referral&utm_campaign=RSS-ALL&utm_term=News&utm_content=uk'>Keep reading</a>