Those who watched were impressed.
"Kurt Busch is doing a great job today. Guy is a natural. Think he enjoyed his first flat out lap at Indy!" Hinchcliffe wrote on Twitter after Busch posted an early lap of 214 mph.
What will it take to get him to come back?
A forgiving schedule, a chance to build up his stamina and a little more time in these cars.
"Just getting settled into the open cockpit is a whole different thing when the bugs hit your visor instead of the windows," he said, acknowledging he had to get used to the feeling of going flat-out through the first turn rather than braking or downshifting. "I couldn't have asked for anyone else. It was a treat."