People in hysterics at Barron Trump's reaction to Elon Musk's celebration during Donald Trump's inaugural address

Elon Musk was spotted giving an enthusiastic thumbs up during Donald Trump's inaugural speech, which massively contrasted Barron Trump's reaction.

People tuning into Donald Trump's inaugural speech were left gasping for air with laughter after the cameras showed Elon Musk and Barron Trump during the speech.

As Trump commented on America's goal of putting a person on Mars, Musk is seen giving a super enthusiastic thumbs up, while stood next to Barron Trump and applauding.

Barron on the other hand, looked pretty unfazed by the whole thing and doesn't so much as give a smile. Take a look:

As you can imagine the clip of the moment has already started spreading on social media with many delighted by the night and day difference between the two men.

One user commented: "Barron Trump looked like he feared being the first person sent to Mars."

While another wrote: "Barron Trump giving zero f**ks about Mars while standing next to Elon Muck."

A third wrote: "Tuned into the Trump inauguration speech for literally less than a minute and was just in time to get this screen shot of Barron Trump looking like he wants to k*ll himself being stuck next to Elon Musk."

With another adding: "I’m gonna assume Baron Trump is Not a fan of Elon Musk by what I just saw on cam lol."

The only acceptable face to make when Mars is mentioned (YouTube/AFP)

Now, it does make sense why Musk would be spotted applauding and beaming ear to ear based on what Trump said.

The now sworn-in-president said: "We will pursue our manifest destiny into the stars, launching American astronauts to plant the Stars and Stripes on the planet Mars."

This is something Musk has publicly spoken about for years and a man on Mars is one of the goals he wishes to see achieved in his lifetime - despite the planet recently being deemed as 'unsafe for humans to live' by experts.

Despite the hopes of Musk, experts have also been clear of the many difficulties that starting a civilization on Mars could expect.

Last year David Kipping, the Assistant Professor, Department of Astronomy at Columbia University, spoke to Valuetainment and explained how some people have their doubts regarding Musk’s plans to put civilizations on the red planet.

He said: “Yeah, some of my colleague’s kind of think it's ridiculous and think it's just totally crazy that we'll ever do this.”

Humanity getting to mars has long been a dream (Getty Stock Image)

However he did note that he had no issue with Musk putting his money into projects that could lead to Mars’ colonization.

He continued: “I get the philosophy. The philosophy is, as long as we're all on planet Earth we're at risk because all it takes is one giant meteor or one nuclear war or whatever cataclysm you want, and we're all gone.

“So, if your objective is to preserve the species then it totally makes sense that you would want to have a second base and whether that base be on the moon or Mars, I don't really have a strong opinion.”