Former President George W. Bush appeared to slip something from his pocket to former first lady Michelle ObamaMichelle LeVaughn Robinson ObamaTrump should heed a 1974 warning penned by Bush 8-year-old girl goes viral dressing up as hero Michelle Obama Transplanted uterus: Complications on fertility shaming are born MORE at the state funeral service for his father — an apparent nod to a memorable moment the pair shared at Sen. John McCainJohn Sidney McCainOvernight Defense: Senate Armed Services chair eyes Russia, China threats | Pushes Trump not to cut defense budget | Mattis says US looking for more Khashoggi evidence Dem strategist says Trump should not have attended George H.W. Bush's funeral Inhofe eyes Russian, Chinese threats in first major speech as Armed Services chairman 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 TrumpCorsi sues Mueller for alleged leaks and illegal surveillance Comey: Trump 'certainly close' to being unindicted co-conspirator Trump pushes back on reports that Ayers was first pick for chief of staff MORE, first lady Melania TrumpMelania TrumpJohn Kelly was always doomed to fail as chief of staff Trump to help impoverished nations educate their children Internet gambling addiction is a looming crisis 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