That makes some sense. I definitely know what you mean with the tunnel vision effect going all out can have on a person. I just never get it so bad that I'm in danger of not being aware of traffic.

Then again I've also been a skateboarder for 15 years and I think I got used to going at it hard with other skaters in the skateparks zooming by, so it could just be one of those things I take for granted.