Things got a little messy for Jimmy Fallon during his interview with Donald Trump.
The "Tonight Show" host managed to achieve what no other individual has publicly accomplished: He messed with The Donald’s signature coif.
Watch Jimmy Fallon mess up Donald Trump's hair on 'Tonight Show'
Play Video - 0:38Watch Jimmy Fallon mess up Donald Trump's hair on 'Tonight Show'
Play Video - 0:38
“The next time I see you, you could be the president of the United States,” Fallon noted in his wind-up to asking if he could do something to Trump “that’s just not presidential.”
“Can I mess your hair up?” Fallon said to massive audience cheers and applause.
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Trump grimaced and shook his head at the idea before relenting a few seconds later.
Fallon then went nuts, wildly flipping his hand back-and-forth through Trump’s bouffant hairdo.
Andrew Lipovsky / The Tonight Show with Jimmy Fallon
Trump smiled throughout it all. Afterward, he modestly, and unsuccessfully, tried to put his locks back in place.
RELATED: Dr. Oz says Trump is 'healthy enough to be president'
In a previous appearance on "The Tonight Show," Trump participated in a skit where he appeared to interview "himself." In reality, he looked through a mirror to see Fallon, sporting a Trump wig and mimicking his trademark gesticulations.