That left almost four hours of the six hour session open to the entire field to come out for a ninth consecutive day of practice. It would be the last chance they get before a single hour-long session on Friday to shakedown their brand new race-issue engines, after which next time they would be on track at Indianapolis would be a week from now on Race Day itself.
Charlie Kimball was an early taker for some practice laps: a few minutes later, he was really wishing he hadn't. In a repeat of the accident that had put Ed Carpenter into the wall on Pole Day, Kimball found himself spinning out of turn 1 and into the SAFER barrier. Like Carpenter, the car tipped up briefly onto its left side: experts were quickly debating whether this apparent tendency to tip over was a problem with the new Dallara DW12 chassis, or whether it was vindication of the new sidepods stopping it from flipping over totally upside down.
Whatever the nuances, Kimball was left embarrassed - and his Ganassi team with a lot of work on their hands.
"It's really disappointing to go out today and crash the car. Fortunately, the chassis is OK, and the guys have plenty of time and are well into fixing it already," said Kimball, who was quickly evaluated and released by the infield medical care centre.
"I just feel bad for the Novo Nordisk Chip Ganassi Racing crew because we have been having a very good month," he added. "We still have a really good race car, and I just made a mistake. I learned my lesson, and we'll go out and have a really good race next weekend."
Kimball's accident was a sobering reminder to everyone that while qualifying was over and the grid was set, Indianapolis still had teeth with which to bite the unwary. Everyone took it rather more cautiously after that, and there were no further incidents for the remaining practice time.
The chequered came out at 6pm, and that was it: the weekend was done. There would be no more track activity at IMS until Thursday, when the Firestone Indy Lights teams start practice and qualifying for the Firestone Freedom 100.
See Bump Day qualifying times
The practice times from Sunday
are also available.
Or click here for the full starting grid
of the 2012 Indianapolis 500.