Former President George W. Bush appeared to slip something from his pocket to former first lady Michelle ObamaMichelle LeVaughn Robinson ObamaWarren praises Ocasio-Cortez in Time 100 Beyoncé in 'Time 100' profile: Michelle Obama empowers black Americans Time 100 list almost half women for the the first time MORE at the state funeral service for his father — an apparent nod to a memorable moment the pair shared at Sen. John McCainJohn Sidney McCainTrump gives nod to vulnerable GOP Sen. McSally with bill signing Democrats need a 'celebrity' candidate — and it's not Biden or Sanders Juan Williams: The high price of working for Trump 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 TrumpHouse Dems demand Barr cancel 'inappropriate' press conference on Mueller report DOJ plans to release 'lightly redacted' version of Mueller report Thursday: WaPo Nadler accuses Barr of 'unprecedented steps' to 'spin' Mueller report MORE, first lady Melania TrumpMelania TrumpOvernight Health Care: CEO of largest private health insurer slams 'Medicare for All' plans | Dem bill targets youth tobacco use | CVS fined over fake painkiller prescriptions | Trump, first lady to discuss opioid crisis at summit Melania Trump, Karen Pence say they're ready to serve four more years in White House Trump, first lady to discuss opioid crisis at Atlanta conference 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