Looks like a contrail is flying in to the engine :-) Seen from seat 14 A, the last row of business class.
 Somewhere over Sharjah or Ajman in the UAE... Seat 14 A.
 Right after taking off from Dubai. You can see the ground being mirrored on the wing. View out of the last row of business class, 14 A.
Beeing towed from the manteinance area to the Lufthansa concourse for its next flight.