He is simply quite incorrect concerning the activity of a brain during a coma. Simply google papers on the brain activity during comas. This man claims the brain was not functioning, not only is this impossible to state in his scenario, it is wrong. Also this is NOT science, it is not even anecdotal evidence as the person was lacking capacity, it is just 'pub talk' or its weaker younger brother 'church talk'.
for those that struggle hunting for real science and identifying bias bumcum, here is a good article
http://www.nature.com/news/neuroscience-the-mind-reader-1.10816
if you really are interested in the TRUTH of this topic. Please explore published papers by Dr Adrian Owen and the very active human brain during comas and even vegitive states.
Snare