system
Given the following post, respond as if you're commenting on Reddit:
human
[Dragon Ball]Where does all that extra hair come from in SS3?

I live in a pretty large city which inexplicably has a large desert wasteland adjacent to it. I was traveling through it for work when a huge battle broke out between two flying creatures. At least one of them was a creature, one looked like a human. Any who, during the fight the guy's hair turned blonde. Afterward, it suddenly grew to waist length. Where did that hair come from? I mean wouldn't it get pulled or something?
gpt
The flying guy you witnessed was an example of an alien species known as a Saiyan. Saiyans have the ability to convert ambient particles in the universe into pure energy while under extreme emotional stress, also known as going "Super" Saiyan. This sudden influx of power in their bodies turns their hair golden and cause rapid growth as a way of storing the excess power. 

When the energy absorption ends the storage is drained and their hair returns to its natural colour and length.