Procrastination
Procrastination operates at a velocity that physicists describe as negative speed — the remarkable ability to move backwards through a to-do list whilst remaining physically stationary. The Copenhagen Institute for Temporal Dysfunction measured the average procrastinator's task completion rate at minus 3.7 items per hour, as each avoided task spawns 2.4 additional guilt-related sub-tasks. This anti-momentum creates what researchers call a 'productivity black hole' from which no deadline can escape.
Horse
The horse achieves speeds of up to 55 miles per hour, a velocity that the British Equestrian Standards Board describes as moderately brisk. More impressively, horses maintain consistent forward momentum without the paralysing self-doubt that plagues human movement. A horse has never stopped mid-gallop to wonder if it should have taken a different career path. The Thoroughbred Velocity Research Centre in Newmarket confirms that horses waste precisely zero seconds contemplating whether they really need to run or could probably do it tomorrow.