Yellow phlegm is normally a sign of an infection, or a case of the common cold. Greenish or brownish phlegm is nearly always a sign of infection. Greenish or rusty phlegm or phlegm with rusty spots can also be a sign of pneumonia. Coughing up brown phlegm is also a common symptom of excessive smoking.
A flowboard is a variation on a skateboard, combining aspects of surfing, skating and snowboarding.
Answer Wiki. 1 Answer. , Waverider; water surf photographer; former surf contest supporter. A hydrofoil surfboard is like a hydrofoil boat where there is a wing-like structure underwater that, at speed, lifts the hull above water.