... can you get me a new set of lungs?

Kicking it in the lounge, listening to tunes...
Heater is on...
Dinner is cooking...

All this and there is something wrong...

I get up to get a drink (no one else was sitting at the time),  I take a few steps and slip over, crashing to the floor!  I take a quick look down and notice some slimy thing lying on the carpet.  Not to worry I says... it's just the lung I coughed up last night!!