Procrastination
The velocity of procrastination defies conventional measurement. A procrastinator can transition from productive intention to complete inertia in approximately 0.3 seconds, the time required to notice a notification on one's mobile device. This represents a negative acceleration unmatched in the natural world.
However, procrastination also enables remarkable bursts of deadline-induced velocity, during which practitioners accomplish eight hours of work in forty-five minutes. Scientists term this phenomenon the panic coefficient, and it remains poorly understood.
Rocket
The Saturn V rocket achieved speeds of 39,897 kilometres per hour during the Apollo missions, sufficient to escape Earth's gravitational influence entirely. Modern rockets regularly attain orbital velocity of approximately 28,000 km/h within minutes of launch.
The Falcon 9 booster returns to Earth and lands upright at speeds that would vaporise a procrastinator's to-do list instantly. Rockets do not recognise the concept of starting tomorrow; they operate exclusively in the present tense.