After the accident, the Swede was taken to hospital, where after medical examination he did not have to be hospitalized.

"Just got out of the hospital," he writes on Twitter, obviously relieved. "I was definitely lucky to get away without any more serious injuries after visiting the fence there".

"I have a little back pain and some headaches but otherwise feel ok," Rosenqvist adds in a press release.

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See Felix Rosenqvist's crash in Indycar

And mentally he's already back at the wheel. "I'm looking forward to being back in the car again at Gateway in a few days," he says, aiming for the next race, in Illinois on Saturday.

In the press release he also expresses joy and relief that all four other drivers - Alexander Rossi, Takuma Sato, Ryan Hunter-Reay and James Hinchcliffe - who were involved in the crash, managed without injuries.

Five cars

In total, five cars were involved in the accident at the Pocono track in Pennsylvania. Sato was the one who triggered the chain of events by driving into Rossi's car. Japan's car then bounced back out onto the oval track and hit Rosenqvists, who at very high speed was torn to pieces along the fence and then hit the ground.

The TV pictures showed how the Swede remained in his car while the rescue personnel came to him. After a minute, Rosenqvist was able to get out of the car and looked to be able to get off the track himself.

Rosenqvist was first cared for at the track's hospital.

"I can only say that he has no life-threatening injuries," said competition doctor Geoffrey Billows in Viaplay's television broadcast, after the decision to have him checked out in hospital.

On oval tracks, speeds up to 370 kilometers per hour can occur.

Critical course

Felix Rosenqvist runs her first year in Indycar, one of the US's largest car sports series. The Swede is in ninth place overall and came second in the last race in Ohio in July, which is his best position so far.

Marcus Ericsson, the other Swede in Indycar, was not involved in the major accident. He finished 12th in the shortened race, and is 15th overall.

The Pocono track has previously been criticized for being too dangerous to drive. As recently as last year, a very serious accident occurred on the track when driver Robert Wickens was seriously injured after driving on a competitor's car. Wicken's car flew into the security fence and spun around several turns at very high speed. The Canadian is in a wheelchair after the accident.

It was Wicken's place in the Schmidt Peterson Motorsport stable that Marcus Ericsson got to take over this year.