The technology to collect data and show results is really great for research, but so far there is no way for the higher mass Brain to keep from moving in the less dense Cerebrospinal Fluid when inertia changes so fast you have a great amount of - Gravitional Forces (GForce) going from 300+ MPH to Zero instantly. Once again basic Physics shows us that the human Brain which is about (60/40) fat and combined others has a Specific Gravity of between 1.03 & 1.26 and the CS fluid a SG of 1. Inertia shows us that the denser Brain is going to try to keep moving 1.25 times more than the less dense fluid. Multiply this by the GForce number and you have "Houston We have a Problem"! In this Case the number that the RacePak got was 50. Include that with the age factor and it is almost unbelievable that John is still with Us. I don't think it was Elvis that he saw this time - Pretty sure this time it was a way higer "Pay Grade" that helped him.