It's rude to talk about other's medical conditions.
Mark works in an office with his friend, who has bipolar disorder.
Mark wants to be better friends with the boss.
Mark invites his boss to lunch since they seem a bit depresssed.
Mark talks about his friend's manic episodes and how out of control he gets, to make his boss feel closer to him.
Mark talks with his boss, and they both feel better, as the boss needed a break and Mark feels he knows and trusts his boss better.
Mark's boss ends up letting the friend go because they're not seen as stable and reliable in the workplace.