Mark Zuckerberg Defends Oculus in Court Against VR RivalFacebook is on the hook for $2 billion in a lawsuit against ZeniMax Media over the creation of the Oculus Rift.

Facebook founder Mark Zuckerberg was grilled in court yesterday morning over the creation of the Oculus Rift VR headset, as part of a$2 billion lawsuitbrought by ZeniMax Media.

ZeniMax -- the owner of Bethesda Softworks, id Software and other video game studios -- says Oculus chief technology officer John Carmackstole ZeniMax's intellectual propertywhen heleft the companyin 2013. Essentially, ZeniMax argues that it owns the technological foundation behind the Oculus Rift VR headset.

Zuckerbergpurchased Oculus in 2014in a deal estimated to be worth $2.3 billion -- and as he made clear on the stand this morning, he disagrees entirely with ZeniMax's claims.

Lawyer, incredulously: "Your plan was to begin legal diligence on Friday, and sign the deal on monday."

Zuckerberg: "Yep."

— ?_? (@MikeIsaac)January 17, 2017

The New York Timestechnology reporterMike IsaacandGizmodoreporterWilliam Turtonhave been live-tweeting the Facebook-ZeniMax trial, where Zuckerberg was first on the stand today. According to their tweets, Zuckerberg was questioned about a letter ZeniMax sent to Facebook two weeks after closing the Oculus deal, outlining the company's legal concerns over potential stolen tech.

Zuckerberg apparently brushed off the letter.

"It is pretty common when you announce a big deal or do something that all kinds of people just kind of come out of the woodwork and claim that they own some portion of the deal," Zuckerberg said, according toIsaac．"Like most people in the court, I've never even heard of ZeniMax before. I know that our legal team would look into this and examine this, but they aren't going to take a lot of my time on something they don't think is credible."

ZM lawyer: "If I steal a bike, paint it and put a bell on it, does that make it my bike?" Zuck scoffs, "no."

— William Turton (@WilliamTurton)January 17, 2017

Details about Facebook's purchase of Oculus are coming out in the trial, as well. Zuckerberg apparently moved throughthe acquisition process quickly, planning tovet Oculus on a Fridayand sign the deal the following Monday. Plus, there are some financial nuggets here: Facebook paid "about $2 billion" to buy Oculus as a company, plus it threw down an additional $700 million to retain key employees and set aside $300 million for milestones.

Zuckerberg also shared his thoughts on the promises of VR in general. "We want to get closer to this kind of perfect representation, so you can capture a moment you had," Zuckerberg said, according toIsaac．

Zuckerberg additionally lamented the closed nature of Google's and Apple's operating systems, reportedlysaying, "We have not been able to build and design some of the best experiences that we want for our community."

The Facebook-ZeniMax trial is expected to last three weeks. Already, Zuckerberg is joined in the courtroom by Oculus founderPalmer Luckey, Oculus PC VR leaderBrendan Iribeand Oculus CTO (or legendary co-creator ofDoom)John Carmack．Luckey's tie is apparentlybright pink, if anyone is wondering.