OpenAI President Greg Brockman testified before a California jury on Tuesday that Elon Musk physically menaced him during a 2017 dispute, saying he feared the billionaire was about to strike him. Brockman said the confrontation occurred after Musk was denied full control of the company and stormed out. The testimony came during an ongoing trial in which Musk alleges OpenAI misused his $38 million founding donation when it transitioned to a for-profit structure.