60 Minutes recently ran a segment on the cumulative damage of relatively small explosions (such as rifle shots) can lead to brain injury and dementia, even with hearing protection.
I know i gave you a little crap vis a vis the toyota stuck accelrator thing in another thread, but i quoted you about this stat twice, yesterday. I rarely pay attention to usernames when replying, and you have a breadth of experience that doesn't immediately identify who's "speaking."