dragonballdensetsu:

Muten Roshi: Long ago, your grandfather, Son Gohan, told me something. One day, deep in a valley, he found something unusual, like it had fallen from the sky. When he got closer and looked at it, there was a round Capsule, and inside it was a baby that had a tail.

He took him home, and tried to raise him… But he had a violent disposition, and never took to him, and he was utterly at his wit’s end over him.

But then, one day, he fell into a ravine by accident… and hit his head hard, nearly dying. However, having an unbelievable life force, the baby apparently survived.

What’s more, afterward, his violent nature disappeared, and he became a good little boy.

(Dragon Ball Z ep 2)