Criss:
There was a reason that I didn't go to medical school.
I've just re-read the first 2 pages of this thread, and looked at the SF VFR Terminal Chart.
There is a lot of confusion including the type of small aircraft involved.
The Terminal chart shows Hwy 101 crossing the extended centerline of 28L at approximately a 45% angle. This leads me to believe that the Cessna's left turn wasn't very radical.
I would like to see the actual radar track of the incident. I wonder how close the two aircraft really got. All I could find was 200 to 300 ft horizontally and 300 ft. vertically.
The human eye is a great lens. It has the ability to act as a wide angle or telephoto, or a combination of both. As the mirror on my Honda says, "Objects are closer than they appear." The opposite is also true, when startled, the human eye fixates on the object, and it appears to be much closer than it actually is.