"Clever" might be overshooting it. Certainly exploratory, though, and he's constant restless motion that finds every sort of thing that may or may not want to get found. There's a big box up in a-- what had Capable called it? Tree, right-- and Nux is instantly slamming his palms to the trunk, staring upward.

He's never climbed a tree. Can't be too different from a big rig or a mast like when he'd had to yank a dead polecat off his perch, get rid of that drag that one time?

Nux does a ferocious leap upward, fingers clawing at the dry bark, arms and legs wrapping comically around the trunk as he starts to shimmy his ascent. There's branches he can grab, so those are grabbed. Used as leverage for dirty hands and boots as he makes a ludicrous scramble up the tree and into the box itself. It's a box that looks made to be lived in and Nux throws a sweeping gaze all over it as he simultaneously hurls himself into it.

"Ah-- !" Just a noise. A panting-noise of victory and awe. What is this mystery place? Bolt must be in the other room or Nux just hasn't noticed his silent so-called Bullet Man yet.