I have never gone with the bubbles/lung theory.I do go with bright red/pink/lung though.It means high concentration of oxygen to the red blood cells.Bubbles can appear from blood spewing through a tight wound kinda like the difference in a water hose w/o a nozzle and a hose with a nozzle.


Psalm 27:1 The Lord is my light and my salvation,whom shall I fear? The Lord is the strength of my life;of whom shall I be afraid?