On Saturday, Iran's supreme religious leader Ayatollah Khamenei tweeted this picture of what many say is a silhouetted President Obama holding a gun to his head.
The tweet is in response to Obama saying that the U.S. could still use military force should the recent nuclear deal with Tehran fall through.
Under the deal, Iran will be forced to limit its nuclear program in return for the lifting of billions of dollars of Western economic sanctions.
Ayatollah's picture reads, "We welcome no war, nor do we initiate any war, but if any war happens, the one who will emerge loser will be the aggressive and criminal U.S."
Ayatollah Ali Khamenei
Iran leader tweets photos of Obama holding a gun to his head
Iranian President Hassan Rouhani walks past a portrait of Iranian supreme leader Ayatollah Ali Khamenei as he arrives to give a speech during a press conference in the capital Tehran on August 29, 2015. AFP PHOTO / ATTA KENARE (Photo credit should read ATTA KENARE/AFP/Getty Images)
TEHRAN, IRAN - OCTOBER 07: Iran's Supreme Leader Ayatollah Ali Khamenei speaks during a meeting with generals of Navy of the Army of the Guardians of the Islamic Revolution and their families in Tehran, Iran on October 07, 2015. (Photo by Pool / Supreme Leadership Press Office/Anadolu Agency/Getty Images)
NOWSHAHR, IRAN - SEPTEMBER 30 : In this picture released by the official website of the office of the Iranian supreme leader in Nowshahr, Iran on Wednesday, Sept. 30, 2015, Supreme Leader Ayatollah Ali Khamenei attends a graduation ceremony of the Iranian Navy cadets in the Northern city of Noshahr, Iran. (Photo by Pool / Office of the Iranian Supreme Leader /Anadolu Agency/Getty Images)
ran dini lideri Ayetullah Ali Hamaney, mam Humeyni Nuehr Deniz Kuvvetleri Harp Okulu'nda dÃ¼zenlenen mezuniyet tÃ¶renine katld. (Photo by Pool / Office of the Iranian Supreme Leader /Anadolu Agency/Getty Images)
Iraqi security forces stand on top of a building covered with a poster of Iran's supreme leader Ayatollah Ali Khamenei and Jerusalem's Dome of the Rock the third holiest site in Islam, during a demonstration marking the Quds (Jerusalem) International day in the capital Baghdad, on July 10, 2015. AFP PHOTO / AHMAD AL-RUBAYE (Photo credit should read AHMAD AL-RUBAYE/AFP/Getty Images)
Iranian President Hassan Rouhani delivers a speech under portraits of Iran's supreme leader, Ayatollah Ali Khamenei (Center L) and Iran's founder of the Islamic Republic, Ayatollah Ruhollah Khomeini (Center R), on the eve of the 25th anniversary of the Islamic revolutionary leader Ayatollah Ruhollah Khomeini's death, at his mausoleum in a suburb of Tehran on June 3, 2014. AFP PHOTO / ATTA KENARE (Photo credit should read ATTA KENARE/AFP/Getty Images)
TEHRAN, IRAN - JANUARY 29 : Turkey's Prime Minister Recep Tayyip Erdogan (not pictured) meets with Iran's Supreme Leader Ayatollah Ali Khamenei on January 29, 2014 in Tehran, Iran. (Photo by khamenei.ir/Anadolu Agency/Getty Images)
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Which is from his speech on July 18, in which he said that the nuclear agreement made with diplomats earlier this month "will not change" Iran's policies toward the U.S.
That speech was followed with chants of "Death to America" and "Death to Israel."
Many Twitter users responded by mocking the tweet, not taking the threatening image seriously.
@pourmecofee said, "Um, check the agreement. You can't tweet memes without approval of UN Meme Council."
And @Will_Antonin tweeted, "Whoa. Since when did Iran develop graphic designers with a 'Mad Men" aesthetic?'" He makes a good comparison.
However others -- specifically U.S. Secretary of State John Kerry -- have called Ayatollah's response to the deal "very troubling."