It's because you are playing a 3-dimensional game on a 2-dimensional screen. You may have had negative numbers showing before he was suddenly
right there but thought it was because you were gaining on his 6, not because he had reversed on you. Happens to me all the time. I got a surprise HO this way once. Was closing to about 300 when I realized he was coming right at me.

I had a duel yesterday with someone yesterday with icons off. That was interesting. Between not knowing which way he was going, how close he was, whether I was gaining or falling further away and just plain loosing sight in the ground clutter, it was a real handful.
I'm lost without an icon.
wrongway