What Even Is This?

Seriously, I don't know what else to title this-Surface Tension

Yep, more Black Mesa! What a surprise.

Anyway, having taken down not the first but the second helicopter sent to kill you, you can proceed along the cliffside without being shot to bits.

And this is one of the moments in "Surface Tension" that does a really good job of telling you that this entire incident just keeps getting bigger, just keeps expanding outward. As you start to climb up the side of the cliff, if you're paying attention, you'll see these two jets fly by.

Then they swoop down over those buildings in the distance...

And a moment later...