Presenting plans to Tim Cook during a meeting can apparently be a harrowing experience. In a profile of Apple's top executive, Reuters reports that Cook presides over meetings like a poker player who's considering his opponents: unreadable and silent, at least until it's time to speak up. "He could skewer you with a sentence," an anonymous source tells Reuters. "He would say something along the lines of 'I don't think that's good enough' and that would be the end of it and you would just want to crawl into a hole and die."

But apparently Cook has a tell that others look for during meetings. According to Reuters, the executive almost constantly rocks in his chair, and any change of pace tends to signify that he's about to speak up. That slow, thoughtful approach to leadership is reportedly a far different style that what Steve Jobs used, falling more toward delegating duties and straightforward instructions. Though that may make meetings nerve wracking, Reuters suggests that Apple has generally become a nicer place to work under Cook. And reportedly, he can even be a funny guy in less formal settings.