My contribution: local flying in a C152 just a few hours after gaining my licence. Went head down for just a few moments; when I looked up and to the right, there was a flexwing microlight coming at me at 90 degrees, and at the same level. I realised I would pass safely in front of him, but when I looked to the left, there was another, flying away from me. Two of them flying in trail, and I had gone right between them. A very sobering moment for me, and a worrying one for them too, I'm sure. They had right of way of course. Lessons learned - keep your focus outside, and flexwings can be hard to see at the same level.