The perspective changing when he saw the ufo, and the time stopping, is consistent with the kind of 4th spatial dimensional stuff mathematicians mention. If you're interested about it, consider these two books, both written by mathematicians (but visual, and easy to understand, no high math in them):
For anyone interested in 4D as a reality/different space, I'd suggest these two books, both written by PhD mathematicians (but easy to understand and very visual):