Zuckerberg went wake-surfing over the holiday weekend, while Musk claims he was working.

The feud between dueling CEOs, Elon Musk and Mark Zuckerberg, is heating up faster than the temps affecting the East Coast this week.

Over the July 4th holiday weekend, Meta CEO Zuckerberg posted a leisurely video wake surfing in a full tuxedo (barefoot, of course) while holding an American flag and sipping on a beer. The Facebook founder moved easily over the waves with Bruce Springsteen’s “Born in the U.S.A.” playing in the background.

Zuckerberg penned the caption “Happy 𝐛𝐢𝐫𝐭𝐡day, America!”

The post received over 1.02 million likes in four days. Some fans even commented things like, “Coolest billionaire CEO ever.”

“George Washington could never,” one person cheekily wrote.

But not everyone was impressed by the CEO’s antics; fellow billionaire and longtime rival Musk did not comment favorably.

In a response to the video, Tesla’s CEO wrote: “May he continue to have fun on his yachts. I prefer to work.”

Musk has long touted “ultra-hard work” with reports of former employees even sleeping in their offices amid round-the-clock deadlines. Musk has also publicly said that remote work is “morally wrong.”

The two have been publicly fighting for years and even sparked rumors of a cage fight last summer after a series of back-and-forth posts. (The fight never happened.)

Wake surfing is something that Zuckerberg has long accredited to be a stress reliever and hobby when he needs to take his mind off of work, especially while spending time in his Hawaiian compound.