I suspect most of that was down the the drivers' being unfamiliar with the 1/8 mile. Our last Weddle chassis was lost at Ohio Valley Raceway because of that very thing. It could be tough to not run off the track on a good pass and the driver simply forgot where he was. He lifted at the scoreboards, which were at 1,000'.
I've seen some of the really amazing physiological research that has been compiled by people like Frank Hawley and Lee Beard. It's dumbing it down a lot, but when you hear a driver get out of the car at the far end and he knows he's run faster than before, he's generally right. Because of the brain's incredible ability to remember, track and channel information, a driver with enough seat time can recognize very minute differences without being aware of it. About the only time Brian was not able to accurately tell me an elapsed time within .005 to .006, before seeing the time slip, was when the car had picked up and had run faster than it ever had.
When you understand that it takes the average human .300 to .400 second to blink an eye and then look at how much ground a really fast race car can cover in that same time, things get pretty amazing. How many races have you seen where the spread between the number one qualifier and the number 16 qualifier is less than .100 second?
The problem arises when you take even the most experienced driver, with hundreds of 1/4 mile passes and put him on a dangerously-short 1/8 mile track. Too much driver experience can be the cause of a real problem.