Donald Trump issued a warning against Kim Jong-un that, well, sounded a lot like something Kim Jong-un would say.

After North Korea warned of "physical action" over sanctions—and as news broke that U.S. intelligence officials believe North Korea has produced a miniaturized nuclear warhead—Trump told Pyongyang not to threaten the United States.

"They will be met with fire and fury like the world has never seen," he said Tuesday, which ... is terrifying.

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The world has seen plenty of fire and fury, including the atomic bombings at Hiroshima and Nagasaki, the 72nd anniversaries of which are being observed this week.

With Seoul, a city of around 10 million people, only 35 miles from the North Korean border, any inflammatory language risks millions of lives. Tokyo is also frequently mentioned as a North Korean target.

Pyongyang doesn't need to develop nuclear missiles that can hit Honolulu and Los Angeles to kill a horrifying number of people, although it's working toward that.

It's a sensitive situation that Trump, obviously, doesn't seem well-equipped for -- and people are understandably scared.

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There were also jokes, which are a natural reaction to things that seem too terrible to be real. And because sometimes you have to laugh so you don't cry.

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And, of course, people brought up not one but two old Trump tweets.

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Stay safe out there, everybody.