You worked for 45 minutes with only one glove to dig your car out of the foot of snow it's parked in. Congratulations, you're dug out! But you're just driving to work and coming right back home again, and you know some lazy good-for-nuthin is gonna come along and cozy right up into your clean spot without even having to break a sweat. Not a problem for you, Bears fan! Behold the wintertime tradition of parking dibs, Chicago-style. How did parking-spot "dibs" start in Chicago, and what are the rules?