Immigration officer at Frankfurt airport in transit from NRT to OSL started laughing about my surname for some reason. He said mr *my surname* and started laughing for a couple of seconds while scanning my passport.

Also another time in the first class terminal at FRA my personal assistent there insisted I showed my boarding pass to the immigration officer (outgoing Schengen passport control) in the basement before the car transfer out to the plane. I had packed my boarding pass in my backpack so the officer saw that I was busy trying to snatch out my boarding pass. Then the officer smiled and said I don't need your boarding pass, here is your passport (you deliver your passport upon entering the first class terminal for non Schengen flights) and enjoy your trip. My personal assistant was embarrassed and just showed the way out to the driver. No that was really not reentering, but rather exiting your own "passport free" zone...