Jimmy Kimmel theorized that President Donald Trump could trigger World War III with an ambiguous statement.

“He’s the only president who teases a bombing the same way ABC promotes new episodes of ‘Will Trent,’” Kimmel said Monday, referring to Trump’s social media post where he seemingly set a deadline for Iran to open the Strait of Hormuz.

“And then today, he changed that deadline. He said Iran could be taken out by midnight tomorrow, but he didn’t specify if that’s our tomorrow or their tomorrow. He could start World War III over a time zone error. Things are running like a Swiss watch, folks,” he continued.

Watch Kimmel’s full monologue from Monday night’s show here: