After reading several posts about "packing" I have come to understand what it really is. Packing causes the amount of air in your lungs to increase without any (or very little) increase in volumn. By applying commonly known gas laws of physics, this must increase the PRESSURE in your lungs. And if you dive with increased pressure in your lungs, then you are in effect doing the same type of dive a scuba diver does. I wonder if this could cause embolism problems if a person were to "pack" too much. If a diver goes down "under pressure" and stays down awhile his blood may adjust to the "packed" pressure. Then when he resurfaces to normal air pressure, has blood could embolize. Any comments?