Zabuza Momochi, one of the most feared men in the land of the waves, was out to slaughter you.
You possesd an extremley powerful kekkei genkai, so he was assigned to murder you. he knew you had a high bounty so he agreed to murder you.
Lucky you, you have your very own hitman at such a young age.
After stalking you for a couple of weeks, he decided to use you to his advantage. Instead of killing you, he'd use you for your powers.
he knew you were no ordinary Shinobi.
He knew you had greater potential and power and he wanted to use that to his advantage.  One day, when you were walking through the forest, he watched you from the trees, waiting for the perfect moment to strike.
Zabuza carefully watched your movements and the way your body language gave him so much information about your figure.