Shephard discovers the marvels of combining environmental hazards, ponders the delicacy that is roast headcrab, and contemplates the philosophical quandaries of resurrection. And then he falls in some water.
Shephard befriends yet more aliens, radios some marines, and comes to the startling realization that not all air vents were designed to be emergency escape hatches.
The good news - Shephard's found reinforcements and they're going to fight their way through a Black Op blockade. The bad news - Freeman's drugs that he accidentally took finally started to kick in.
Shephard recovers from his Oxycodone-induced stupor, misplaces something that was of questionable value anyway, and explores the possibility of film adaptations.