Context: Mum thought he was going to have another heart attack he was getting so wound up . But she managed to calm him down . I must admit I have N - E - V - E - R heard my dad swear like he did when he was telling me about it . So , fat club tonight , then cooking a curry , waiting for S to get home ( yup , he 's working again bless him - almost as bad as me ! )

Question: Why did the anger of the speaker 's father make their mother think he might have another heart attack ?
Options:
0. Anger involves a physical reaction that raises the heart rate and could possibly lead to a heart attack
1. None of the above choices .
2. He was angry because he had accidentally eaten real butter instead of the replacement and was in danger
3. He was angry because the speaker forgot to pick up his blood pressure medication from the pharmacy
Answer: 0