I had two, one flying around a large event, should've known it would be a choke point and more people would be looking at it.
The other was a low level military jet.
In both cases I spoke to the other pilot on the phone, and their tone was very much blaming me for the airprox. Does anyone else find this? I felt in both cases we were both equally at fault, the first one I was looking into sun and the second we were just both at the same level, just bad luck.
All aircraft have blind spots, so the key for me is to keep the head moving around them.