This is one of those talks you either love or hate. I was surprised to see it was one of the highest rated TED talks (on another site) because for some reason I found it rather irritating.
As such trying to put the experience into words is going to be unsatisfying and even absurd. It's vaguely akin to describing the taste of a hamburger to someone who's never eaten beef or bread (or pickles, cheese, etc...). Words cannot suffice.
Of course, I suppose I might see things differently if a blood clot turned half of my brain off for a while.