Ryan Hunter-Reay in 2018 at Detroit

Ah, the things drivers remember in the heat of the moment.

Moments after winning the second NTT IndyCar Series race of the 2018 Chevrolet Detroit Grand Prix presented by Lear, Ryan Hunter-Reay thought back to a conversation he'd had with Detroit television broadcasters the day prior.

The driver of Andretti Autosport's No. 27 DHL Honda had finished second in the Saturday race at Belle Isle Park, and he promised to climb into the James Scott Memorial Fountain if he won the next day.

"I actually thought about that on the in-lap," Hunter-Reay told WXYZ following the victory. "I was like, 'Oh, boy, I promised those guys I would do that, so … here it goes.'"

Hunter-Reay was true to his word, reclining in the fountain's shallow water with a champagne bottle before posing for photos.

"I knew I was going in right when I saw you guys," he told the broadcasters.

So, how was it?

"Freezing," he said. "So cold. It was good fun though."

Chip Ganassi Racing driver Scott Dixon found out this year. After winning the second part of the annual doubleheader, he took a splash. Taking the adventure to a new level, Dixon's crew joined him in the celebration. One even dove in.

Josef Newgarden jumped in the day prior, although his crew did not. That's why he'll vowed to have the celebration go differently if he wins again, "dragging the crew in" with him.

"I love it," he said. "I think (the organizers) have done a great job in making the stage and backdrop of the fountain key to the weekend. I think they are going to do even more next year in making it more of a party in victory lane. That's what victory lane should be."

Newgarden said taking the plunge into Scott Fountain is "without a doubt going to be a great tradition."