Yelling at a child

Date: 2/3/2019

I'm at home with my little brother, he's sitting beside a motorbike. I'm holding a bottle full of water, I want to save lots of water though don't need to drink then. I let my brother drink a little, then he spits back to the bottle and spoiled it all. I'm angry with him and pour all the water to the motorbike's bugi and madly blame it on him for impairing the motorbike. He's defenseless as he's just 6 years old, he's about to cry but try not to.