According to DMG p.47+: A flying creature can crash under certain conditions, e.g. being knocked prone while flying. Crashing itself is descried as falling and taking damage.
The item 'Winged Boots' has a property that you take no damage from a fall.
Winged Boots Level 13 Rare
These enchanted boots protect you from falling damage and can be activated to allow you to fly.
Feet Slot 17,000 gp
Property You take no damage from a fall and always land on your feet.
Power Daily (Minor Action) You gain a fly speed equal to your speed until the end of the encounter.
I was wondering if the property of the boots is still applicable if the character is knocked prone or unconscious?
e.g. I would expect a character to still take damage if he falls for more than the 'Safe Distance' because he is not really standing anymore. I don't really know if this is correct interpretation of the rules. If someone is diving down, head first, would he still land on his feet?