The body functions within a very narrow pH of 7.4. In order to maintain this pH the body has many buffers, perhaps the most important and easiest to understand is Bicarbonate. Bicarbonate is produced by the kidneys in response to increase acid production. The lungs also assist in maintaining the pH by hyperventilating and getting rid of excessive CO2 which is produced through the buffering action of bicarbonate. If the kidneys can't produce enough bicarbonate to counteract the production of ketoacids, a condition known as ketoacidosis is produced with serious metabolic consequences.
Acidosis causes potassium to leak out of cells and into the blood.
High levels of potassium can cause cardiac arrythmias. As the pH begins to drop numerous bodily functions begin to malfunction. At a pH of 7.2 coma usually ensues and at a pH of less than 7.0 the human organism ceases to function. I wouldn't recommend it. I think it is a dangerous game with very high stakes.