Final answer:
In the given context, 'blundered' indicates Harry moved in a clumsy or uncontrolled manner due to his intense fury.
Step-by-step explanation:
The word blundered in this context means to made one's way clumsily or blindly. It implies that Harry moved without clear direction or grace, possibly tripping or stumbling as he went, because he was consumed by his fury. This interpretation matches the second option provided in the question. The descriptions in the examples indicate a lack of precision or control, often involving some sort of physical clumsiness or emotional distress that affects one's movements.