Final answer:
The detailed answer does not contain information about what Peter does to shock his mother regarding Angelika's visit, as the provided text does not specifically mention such an event.
Step-by-step explanation:
The information provided does not specifically mention what Peter does to shock his mother on the day Angelika is coming over.
The extracts hint at various activities and situations involving someone named Peter, but they do not present a clear event that shocks Peter's mother in relation to Angelika's visit.
Therefore, without a direct reference to the specific event in question, it is not possible to provide a definitively correct answer.