Lars Ulrich, Metallica's drummer, has been involved in multiple recent developments including a blood donation initiative with the Red Cross in Las Vegas, the sale of two adjacent mansions for $68 million, and public comments on the band's upcoming Sphere residency, which was influenced by U2's performance. He also shared personal experiences, including a visit to a medical facility and a reported incident involving a helicopter, though the latter appears to be a fictional or exaggerated account.