From an interview with Jaden and Willow Smith:

It’s proven
that how
time moves for you
depends on
where you are
in the universe.

It’s relative
to beings
and other places.
But on the level
of being here
on earth,

if you are aware
in a moment,
one second
can last
a year.
And if you

are unaware,
your whole childhood,
your whole
life
can pass by
in six seconds.

But it’s also such a thing
that you can get lost in.

-Jaden Smith