How was it a carrot?
As I recall, half the book was on his life as a writer and half was on the craft itself. Wouldn't it have been odd if he'd left it out? Personally, I learned more about writing from how he describes it than anything he wrote on the craft, being as it was the best piece of writing he ever did IMO.
It's been a while, so my recollection is hazy. Essentially, he kept mentioning a big incident all through the book. I suspect, given his preferred genre, that he just couldn't help himself and had to build suspense. It felt clumsy to me. I have no problem with the inclusion of the accident, but I do remember being annoyed by the build up to it.
Of course, that's just my opinion, probably tinted by the fact that I'm not a fan of his writing.