I've also met an EK purser who sent me a PM after EK4 once. I wanted to upgrade with miles on board but he knew the flight was full and hinted before I got there!

Slyly said that he knew I didn't recognize him when I saw him but he knew me by my handle and obvious intentions to ask on board. Quite a freaky and cool coincidence!

He came as the flight was descending to apologise that I couldn't upgrade my flight with him today and handed me the fast track card.