Our airport only has a taxiway to the North end of the 4,000' strip. You have to back taxi to the South end if you want to take off.
One calm wind day I was in the South runup box and a Citation was taxiing South to the end of the runway. When he was not more than 500 feet away, I called him and asked if he would need the runup box. He said he hadn't seen me there. It was scary for someone flying a jet to be near blind. My plane is orange/white and REALLY visible.
This made me think alot about what would happen had he decided to take off to the South. I like to think that I would have seen HIM, but with no runway preference and a blind jet pilot, it kind of makes you wonder.