"Ten laps of the playing field as fast as you can," the guard said as they all lined up. "Or thirty laps flying for the pegasi. Trotting is permitted for non-pegasi but your score is determined by how fast you do it. Also, you must not leave the track, or you will be disqualified. You must not touch any of the others to even help them up if they fall, or you will be disqualified. If you simply cannot run that far, you are... that's right, disqualified. However, if you are disqualified, you will have a chance to do it again until you are qualified."