Pressure

Thinking.

Strapping the pipe with ultrasonic sensor.

Low pressure signal, examine the pipework.

Chemical precipitation features.

Rust lines.

Striking a match.

Thinking.

Partially filled veins, everything else is there, 

Only a heart-shaped closed cavity.

Echoing another chest.

Copper soldering.

Light a Lucky Strike

Thinking. 

Black ink will do, since there is no other way.

Pressure's gonna have to be restored.

Black-hearted girl.

Butterfly valves.

Come back, inhale.

Foo Figthers - My Hero (acoustic)