Injured in hospital following shooting

The transcript captures a moment of surprise or realization, expressed in the phrase 'I had no idea.'

What do you think the speaker meant by 'I had no idea'?

Can you describe a situation where you felt like you had no idea about something?

How do you think the speaker felt when they said 'I had no idea'?

What could be the reasons for someone to say 'I had no idea'?

In what contexts do you think this phrase might be commonly used?