Pretty strange... At ICN, during pushback the captain comes on and says we are going to go to a deserted part of the airport and shut down the engines (inaudible as to the reason) then afterwards start engines and taxi for takeoff.

So, here we are with the engines off and it appears we are being de-iced as a truck with boom is spraying some stuff over the wing surfaces.

This strikes me as odd since it hasn't rained or snowed here. What is further odd is the truck is now spraying the entire airplane, it just got done spraying my windows and the top of the fuselage, and now it is moving to the front of the airplane. I have never seen a de-ice of the entire plane, just the wings/tail.

Odd...