Vico and the 20 minute lifetime

I can not remember any experience that could be called a 20 minute lifetime. When I think of a 20 minute lifetime, I think of one seeing his life flash before his eyes, so to speak. I have never had such an experience that I can remember. This does not mean that it has not happened to me, only that I can not think of such an instance, with the exception of dreams. I often have dreams in which it seems like a lifetime goes by and I wake to find that I had only been sleeping for less than an hour.