Twenty-minute cool-down time. I don't know about newer cars so much, but in the olden days, that was pretty common. The top of the block cooled enough for the 'automatic' choke (usually a bi-metalic, thermostatic coil type) to relax and let it set a high enough fuel-air ratio to start.
Sometimes (not always, it depends on the throttle design), pumping the gas pedal will help. Other times it will just flood the cylinders, with nearly-identical symptoms and more down-time while you kill your battery flushing out the excess ... :-S Note this also depends on the car model.
If it happens again (climatic conditions, humidity even more than temperature, may modulate this, both in severity and time to re-start) you now know the rituals, anyway. ;-)
(no subject)
Sometimes (not always, it depends on the throttle design), pumping the gas pedal will help. Other times it will just flood the cylinders, with nearly-identical symptoms and more down-time while you kill your battery flushing out the excess ... :-S Note this also depends on the car model.
If it happens again (climatic conditions, humidity even more than temperature, may modulate this, both in severity and time to re-start) you now know the rituals, anyway. ;-)