Romain Grosjean walked away unscathed from a heavy and alarming crash caused by a loose drain cover in second practice for the Malaysian Grand Prix.
Grosjean spun off the circuit at the high-speed Turn 13, bouncing across the gravel and hitting the tyre barrier. When he came to a stop his left rear tyre had been torn from the wheel rim, with subsequent replays showing it had been heavily damaged by a drain cover which had become displaced on the inside kerb.
Haas driver Grosjean was unhurt and immediately returned to the pit-lane, where he told the media he had not noticed the cover, which had been freed from its normal position by Valtteri Bottas' Mercedes and Kimi Raikkonen's Ferrari moments before.