Not including TCAS avoidance I've had 2 serious 'air misses'. Popped out of cloud in a heavy four jet to find similar type crossing right to left same level. We passed very close behind him and got considerbly thrown around by the wake turbulence. We were under radar control. The controller was dismissed.
Dropping paras from a BN2T in a danger zone I wasn't keeping a look out because the zone was exclusively mine. I know, no excuse. Missed a glider by feet. 3 at the most. Later in the day he came to see me and started to rant and rave about me nearly killing. Got his details and reported him for the incursion.