Mark Zuckerberg, known for his mainly casual attire, wore a suit yesterday. He shocked the public when we attended court to defend Oculus in court.

Instead of his usual gray t-shirt, the Facebook CEO had a jacket and even a tie to prove in court that his technology in Oculus wasn't stolen, as accused by ZeniMax Media.

The case involves John Carmack, a guy Oculus hired from ZeniMax, who worked there as the company's chief technology officer in 2013. The lawsuit was filed in early 2014 for stealing intellectual property.

Carmack has denied using his work at ZeniMax to build Oculus. Same goes for Zuckerberg, who said "I'm here because I believe the claims are false, and it's important to testify to that. The idea that Oculus products are based on someone else's technology is just wrong."