I'm not sure if the "Narrow Escape" badge - "Kill an enemy that nearly killed you" is working. Ignoring the many many mid or long range duels that I've only just killed my opponent and only just survived... In IB this time around I had someone run up behind me at a capture point and shotgun me so I couldn't make out a health bar at all. I swung around and fired my shotgun point-blank for a one-shot-kill. I'm assuming that level difference provided my miraculous survival from this encounter. If that wasn't worthy of "Narrow Escape", I've no idea what would be!