I did not see that

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https://preview.redd.it/ju9aclzb7csb1.png?width=430&format=png&auto=webp&s=f0f56d3101dc4398997a2d8393b6696ab33c54c8

Goku jumpped a unexpected long way over the mines and the girl Bulma said 'I didn't see that... nope...Did not see that '

I guess she was saying 'I did not see that (coming)', But what's the point of 'nope',

it means 'no', right?

If so, 'didn't see that ' is same as 'did not see that ', why did she 'nope '?

Any daily examples like this?