After getting trapped in an alien cocoon, you must escape in A:CM

"Escape" is a mission objective in the game Aliens: Colonial Marines

Briefing

You wake up in an Alien Carapace and must escape

Mission

The Raven

Locations

Sewers (Below Hadley's Hope)

Walkthrough

Just start running, You have no weapons at this point, you will be recovering them later in the mission.