If we saw snapshots then 'the same phenomenon that causes backwards-spinning wheels etc.' would be present in real life when looking at spinning objects that are illuminated by lights that are constantly on, i.e. the sun.
I don't know about you, but I thought that was what he was talking about. I have experienced this phenomena in real life on many occasions, going all the way back as far as I can remember as a child.
Under the right lighting conditions, and from the right view angle, if you look at a passing car which happens to have a reflective hubcap surface, you will either interpret the hubcaps, or sometimes even be fooled to thinking the entire wheel is spinning backwards as the car moves.