Scott Sharp is uninjured following his enormous accident in second free practice for the Petit Le Mans race at Road Atlanta, according to his Highcroft Acura teammate David Brabham.
The Acura ARX 02a clipped Dirk Werner's Farnbacher Loles Porsche before flipping violently and making contact with the wall at Turn 2.
"He's fine," said Brabham. "He doesn't understand quite what happened. He says he didn't even see the Porsche. It's a huge blow for us, but clearly the thing we are most concerned about is Scott's welfare.
"We go through that corner in sixth gear, so obviously if you touch someone through there it is going to be a big one."
Brabham added that the accident should be a warning to everyone to give each other room when running in traffic.
"Obviously when you see what happened on the television pictures, there is a lesson there for everyone on this grid."