I was flying as a pax with a work colleague a couple of weeks ago and he was relating a problem on a previous flight where they had had to get a tug because the a/c could not get over a bump. When I suggested this could have been a potential jet blast problem I was astonished to hear that he thought that the wheels were powered for taxi and take off.
He is the head bean counter but reading this thread perhaps he had insider information and was playing dumb.