The news of Max Weinberg’s departure from the Conan O’Brien team gave rise to numerous theories, mostly stemming from that intentionally vague explanation of “mutual agreement”—just the sort of non-statement that’s been employed by various publicity departments and guys who have been dumped for eons. But today Fancast spoke with Weinberg, who explained the real reason he won’t be returning to Los Angeles: Two weeks after Conan’s run on The Tonight Show ended, he had “12 hours of massively invasive open-heart surgery” that influenced his decision to stay home in New Jersey. After all the nasty speculation that it may have been about Weinberg trying to make the jump to Jay Leno’s show or even just a matter of money, there’s nothing like the words “massively invasive open-heart surgery” to hammer home the guilt.