In Stealth Mode

Well the basics first. Nat is looking better than ever, and the powered armoured goon is also quite well done. The environment is quite detailed and I like the run down feel, the faded paints and rusts etc.
Pose wise Nat looks poised and confident which is nice, goon looks laid back and oblivious.
Where I think this excels is the use of multi source lighting and the shadows they cast.
Looking at the scene We can see numerous excellent examples of this. The walkway where the guard stands and his shadow being cast.
The darkened upper floor area.
The highlights and shadowed sections of his armour and most especially the interplay of light and shadow across Nat's skin and costume.
I think due to this use of multiple light sources and shadows this is technically wise one of the best looking scenes you have done.