Former President George W. Bush appeared to slip something from his pocket to former first lady Michelle ObamaMichelle LeVaughn Robinson ObamaFormer patients accuse ex-Fox News medical pundit of sexual exploitation Obama attends UNC-Duke basketball game Obama introduces himself as 'Michelle's husband' at leadership forum MORE at the state funeral service for his father — an apparent nod to a memorable moment the pair shared at Sen. John McCainJohn Sidney McCainGabbard hits back at Meghan McCain after fight over Assad Mellman: Where are good faith and integrity? GOP senator says Republicans didn't control Senate when they held majority MORE's (R-Ariz.) funeral.

Bush appeared to fetch something from his left suit pocket as he walked solemnly into the Washington National Cathedral on Wednesday for the service honoring former President George H.W. Bush.

After shaking hands with President TrumpDonald John TrumpAverage tax refunds down double-digits, IRS data shows White House warns Maduro as Venezuela orders partial closure of border with Colombia Trump administration directs 1,000 more troops to Mexican border MORE, first lady Melania TrumpMelania TrumpTrump, Harris, Ocasio-Cortez, Charlie Kirk among Twitter's most-engaged users The Hill's 12:30 Report: Sanders set to shake up 2020 race Fashion designer Karl Lagerfeld dies at 85 MORE and former President Obama, George W. Bush slipped something into Michelle Obama’s hand. The former first lady smiled.

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The moment was reminiscent of a light-hearted interaction between the two at McCain’s funeral in September, when cameras caught George Bush passing a cough drop to Michelle Obama.

“I didn’t realize at the time that anybody noticed what we were doing,” Michelle Obama later said of the exchange during an interview on NBC’s “Today” show.

“President Bush and I … we are forever seat mates because of protocol, that’s how we sit at all the official functions so he is my partner in crime at every major thing where all the formers gather,” Michelle Obama said.

Calling the 43rd president a “wonderful” and “funny man,” Michelle Obama said in October he slipped her “cough drops.”

“I will add they were old cough drops. That’s the funny thing, because they were in the little White House box, and I was like, ‘How long have you had these?’ And he said, ‘A long time, we got a lot of these!' ” Michelle Obama exclaimed.

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Live coverage: Washington honors George H.W. Bush with state funeral