3.
Because they take risks like this:
5.
Because of fixing things like this:
6.
And going for things like this:
8.
And because they have no shame in trying things like this:
9.
Because they live on the edge like this:
11.
Because fire isn't a concern when they do stuff like this:
13.
And — DEAR GOD — especially this:
14.
Because they constantly test how far they can go in ways like this:
16.
Because they cure boredom like this:
17.
Because a solution to a problem looks something like this:
18.
And finally, just...this: