It kinda seems like he's losing his marbles.

Elon Musk smoked weed and drank whiskey for his appearance on the Joe Rogan Experience podcast, and we're not sure this was the best idea. Shortly after, shares plunged nine percent, wiping $4.3 billion off his company value! We think investors are slightly worried the CEO is coming unhinged.

During the sit-down, the billionaire discussed his plans for an electric airplane, and emphasized the pressing need for humans to switch to more sustainable energies.

"We’re really playing a crazy game here with the atmosphere and the oceans. We’re taking vast amounts of carbon from deep underground and putting this, putting this in the atmosphere, this is crazy. We should not do this. It’s very dangerous. We should accelerate the transition to sustainable energy," he explained.

"I mean the bizarre thing is that obviously we’re going to run out of oil in the long term. There’s only so much oil we can mine and burn. That’s totally logical, we must have a sustainable energy transport and energy infrastructure in the long term. So we know that’s the end point, we know that. So why run this crazy experiment where we take trillions of tons of carbon from underground and put it in the atmosphere and oceans. This is an insane experiment. It’s the dumbest experiment in human history. Why are we doing this, it’s crazy," he added.

Fame seems to be going to his head!