Wonderfully weird photos of presidents who may not have realized there were cameras around.
Ronald Reagan wags his hands and makes faces at reporters attending a dinner for the White House News Photographers Association after asking whether the gesture would be kept "off the record" and saying he'd waited years for the opportunity. May 19, 1983.Bettmann/Getty Images
Lyndon Johnson is interrupted by his pet dog Yuki jumping up on the desk while he prepares to sign a meat inspection bill. 1967. Bettmann/Getty Images
George W. Bush pauses to embrace a person dressed as the Easter Bunny during the annual Easter Egg Roll on the South Lawn of the White House. March 24, 2008.Chip Somodevilla/Getty Images
George H.W. Bush takes a toboggan ride with Arnold Schwarzenegger at Camp David. 1991.Jean-Louis Atlan/Sygma/Getty Images
George H.W. Bush participates in an aerobics exercise class at a YMCA. 1980. Gene Del Biano/CQ Roll Call/Getty Images
Ronald Reagan wears sweatpants aboard Air Force One. Date unspecified.Wikimedia Commons
Richard Nixon shouts gleefully after he was nominated as the GOP nominee for president. July 27, 1960. Bettmann/Getty Images
A stickler for keeping in shape, Harry Truman, "coach" of the Truman Athletic League organized by the newsmen who covered his trip, leads the club in calisthenics aboard the U.S.S. Missouri on the 12-day cruise from Rio de Janeiro. 1947. Bettmann/Getty Images
Calvin Coolidge wears the feathered headdress given to him by the Sioux during a celebration at Deadwood, South Dakota. 1927. Bettmann/Getty Images
Gerald R. Ford campaigns from atop a circus elephant. 1950.Bettmann/Getty Images
Theodore Roosevelt poses beside a slain elephant during a hunt in Kenya's Meru Boma district. 1909.Bettmann/Getty Images
After learning he has been selected as the Republican Party's nominee for president, Warren G. Harding joins the band at his home in Marion, Ohio, playing the tuba. 1920. Bettmann/Getty Images
Halloween fun in the Oval Office as Caroline and John Jr. play "trick or treat" with their father, John F. Kennedy. October 1963.U.S. National Archives
Bill Clinton walks with his cat, Socks, on his shoulders. Date unspecified.U.S. National Archives
Jimmy Carter stands in a pile of peanuts at the Carter family peanut warehouse in Plains, Georgia. At the time, Carter was taking time off from campaigning as a presidential candidate. 1976.Bettmann/Getty Images
Gerald Ford walks with the Kilgore College Rangerettes in Kilgore, Texas, during the Texas presidential primary. Date unspecified.Wally McNamee/CORBIS/Corbis/Getty Images
Theodore Roosevelt and his companion, Baron Rudolf V. Stalin Pacha, ride camels in the Khartoum Desert of Sudan. 1909.Bettmann/Getty Images
Woodrow Wilson is blindfolded so he can draw the first capsule for induction in the World War I draft lottery. 1917. Bettmann/Getty Images
Ronald Reagan with his costars Diana Lynn and Bonzo, in a publicity still from the 1951 comedy, Bedtime for Bonzo.Bettmann/Getty Images
Calvin Coolidge and Speaker of the House Fredrick Gillett exercise in the Congressional gym. 1923. Library of Congress/Corbis/VCG/Getty Images
During a press barbecue at his Ranch, Lyndon Johnson shows off his riding skills as he cuts a cow from the herd. November 4, 1964. Bettmann/Getty Images
Dressed in pristine suits, coached by a team of handlers, and constantly aware that there are cameras around, U.S. presidents are almost always the very picture of poise when they're in front of a lens.
This, of course, makes it all the more striking when some lucky photographer catches the president in a candid moment that reveals just how human these people are after all.
From Ronald Reagan in sweatpants to Teddy Roosevelt on safari, above are some of the most unusual presidential photos ever taken.
Listen above to the History Uncovered podcast, episode 44: The Secret Lives of Presidents, also available on Apple and Spotify.
Next, discover the single most fascinating fact about each and every U.S. president. Then, read about the strangest presidential assassination attempts of all time.