This very closely equates to the "Feckyon Principle", whereby anything you're doing on the computer is important in direct relation to the sudden force of feckyons that attack and screw it up beyond retrieval.
Or the importance of your meeting or appointment is directly proportional to the combination of any factors that gather together - like speeding ticket, roadworks/detours/parades, flat tyre, rain-induced-traffic jams or misplaced car keys - to screw it up.