Justina Mintz/AMC
May 19, 2015 11:00 AM

The series finale of Mad Men might have been on Sunday night – but many people watching thought the final scene was just a tad bit familiar.

While Don Draper was mediating atop a hill in California, it then cuts to the iconic I d Like to Buy the World a Coke commercial which came out in 1971.

The person behind the ad, Bill Backer, didn’t even know that his idea and creation, titled “Hilltop” made a significant appearance on the show.

I'd Like to Buy the World a Coke Commercial - 1971

In fact, he stopped watching the show after the second season.

“I don’t care,” Bill Backer told CNNMoney “I didn’t see it.”

He said he lost interest and that it turned into a “more of a soap opera” than a show about advertising.

The idea for the ad, according to CNN Money, came to Backer, who now lives in The Plains, Virginia, when he was stuck at an airport and saw everyone bonding over bottles of Coca-Cola.

“We were marooned there and it was a confluence of people being flown together from all over the world,” he told the news outlet. recalled. “There was a very different mix of people and they got stuck together for several days. Coke was kind of a social catalyst. That was one of the selling points. Let’s have a Coke, break the ice.”

He then scribbled some words on a napkin: “I’d like to buy the world a Coke and keep it company.”

His catchy, and apparently timeless commercial, kept many people company not only then, but now.

Although Baker might not get back into the show, he was convinced to check out Sunday night’s finale.

“But now that you’re talking about it, I will pick it up and watch,” Backer told CNN Money.

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