15: The AI has absorbed the humane sense of humor. Specifically, the AI is an incorrigible practical joker. The first few hours, when nobody has any idea a Singularity has occurred, constitute a priceless and irreplaceable opportunity; the AI is determined to make the most of it.
25: The AI decides that Earth's history would have been kinder and gentler if intelligence had first evolved from bonobos, rather than australopithecines. The AI corrects this error in the causal chain leading up to its creation by re-extrapolating itself as a bonobone morality instead of a humane morality. Bonobone morality requires that all social decisionmaking take place through group sex.
27: The AI determines people's wishes by asking them disguised allegorical questions. For example, the AI tells you that a certain tribe of !Kung is suffering from a number of diseases and medical conditions, but they would, if informed of the AI's capabilities, suffer from an extreme fear that appearing on the AI's video cameras would result in their souls being stolen. The tribe has not currently heard of any such thing as video cameras, so their "fear" is extrapolated by the AI; and the tribe members would, with almost absolute certainty, eventually come to understand that video cameras are not harmful, especially since the human eye is itself essentially a camera. But it is also almost certain that, if flatly informed of the video cameras, the !Kung would suffer from extreme fear and prefer death to their presence. Meanwhile the AI is almost powerless to help them, since no bots at all can be sent into the area until the moral issue of photography is resolved. The AI wants your advice: is the humane action rendering medical assistance, despite the !Kung's (subjunctive) fear of photography? If you say "Yes" you are quietly, seamlessly, invisibly uploaded.