Main ventilation duct.

Ventilation duct... ..and bingo.

Main ventilation duct.

Jacked right into the ventilation ducts.

There's ventilation ducts in the ceiling.

God!... ...which renders the underground ventilation ducts completely secure.

- 10: 15? - I help Yen into the ventilation duct.

-10:15? -I help Yen into the ventilation duct.

Oh, God! ..rendering the underground ventilation ducts secure.

Oh, God! ...which renders the underground ventilation ducts completely secure.