Sahara Force India driver Sergio Perez flipped in first practice for the Hungarian Grand Prix.
The Mexican ran across the artificial grass on the exit of Turn 11 when a right rear suspension piece appeared to fail, sending the car spinning across the track and into the barrier before flipping over and settling upside down on the pavement.
Perez, with some help from track officials, escaped with no indication of injury.
A red flag was brought out to stop practice and clean up the wreckage.
“It was a really bad accident, pretty unlucky,” said Perez. “The track was dirty and I went on the Astroturf and I collided [with the barrier] on the other side of the track at a very bad angle, so it made the car roll over.
“But everything’s alright. It was a strange accident. I thought it was under control but the Astroturf was very dirty which is why I went in the wall. We’ll have to check everything in detail.”