Hmm... Haley's arrows still came toward him in the smoke before the mummies were destroyed, but if he were under the effect of an overland flight spell, that only grants average
maneuverability. Average does not confer the ability to hover, so I suppose that could be a problem. Failing to move at least 20 feet forward would mean falling/landing. Still, a 3.0 fly spell would last him an hour to an hour-and-a-half and both versions of fly grant good maneuverability (and hovering along with it).
Well, we have seen them touching the ground...
after Belkar knocked him down. He might have been standing
in the witness box (on a box in the box?), but it could have been a chair. He was seated
at the banquet table, but I suppose a slave could have been responsible for moving the chair for him.