Taxi-ing to the departure end of the ICN runway.  This seems to be a logo-jet for something.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/130275500@N02">G B_NZ</a>
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/130275500@N02/16859855422/">KE 773 HL8209 at ICN</a>