Elon Musk spent three days testifying as the first witness in his trial against OpenAI. Elon Musk seems tired and cranky. On Thursday, he took the stand for the third day in a four-week trial stemming from his lawsuit alleging that OpenAI abandoned its mission and should be blocked from taking the company public later this year. If Musk plays his cards right, Sam Altman could be ousted and OpenAI would remain a nonprofit forever. But Musk stumbled at least seven times in ways that possibly put his chances at winning in jeopardy. Most notable, 1) OpenAI’s lawyer managed to get him to make several concessions over his own lawyer’s objections. 2) He also lost a fight to keep xAI’s safety record off the table, calling his reputation as a supposed AI savior defending OpenAI’s mission into question. 3) He repeatedly appeared dishonest, as OpenAI’s lawyer showed documents contradicting his testimony.…