February 13, 2019 2 min read

This story originally appeared on Business Insider

Twitter CEO Jack Dorsey was interviewed by Recode’s Kara Swisher on Tuesday over — you guessed it — Twitter.

Swisher pressed Dorsey to give specific answers to her questions. After quizzing him on tech responsibility, Donald Trump, and abuse on his platform, Swisher asked Dorsey who he thinks the most “exciting influential” person on Twitter is.

Dorsey’s answer: Elon Musk.

To me personally? I like how @elonmusk uses Twitter. He’s focused on solving existential problems and sharing his thinking openly. I respect that a lot, and all the ups and downs that come with it #karajack

— jack (@jack) February 12, 2019

Musk himself chimed in, evidently flattered. “Thanks Jack, Twitter rocks!” Musk tweeted, followed by a string of seemingly random emojis.

While many of Musk’s tweets are irreverent or showcase his love of technology, the “ups and downs” Dorsey refers to can have real ramifications. Musk’s penchant for Twitter became notorious last year after he tweeted “funding secured,” prompting the SEC to slap him and Tesla with $20 million fines.

Thanks Jack, Twitter rocks!

— Elon Musk (@elonmusk) February 13, 2019

He also provoked bewilderment after he tweeted at British cave diver Vernon Unsworth calling him a “pedo.” It came after Unsworth criticised Musk’s idea to build a miniature submarine to rescue the Thai soccer team who were trapped in a flooded cave system in July last year. Unsworth is suing Musk for defamation.

Swisher countered Dorsey’s answer by asking about the rising star of the Democratic party, Alexandria Ocasio-Cortez.

What about @AOC #KaraJack

— Kara Swisher (@karaswisher) February 12, 2019

Dorsey responded that Ocasio-Cortez is “mastering the medium.”

Ocasio-Cortez told Business Insider in January that she writes all of her own tweets but that many of them, “never see the light of day.”