Flying creatures standing up from prone

[James McMurray]

I would also rule that if the creature fell from a height of more than 30 feet in a "cause prone" manner, then it would take falling damage because water is akin to concrete if not entered properly lol...

I could have sworn this was handled already by there being rules for falling into water, but can't find them now. I may be remembering prior editions.

 

[MarauderX]

Thanks to all for their input.

We're against this dragon that was hovering at 5' when it was knocked prone. It was forced out of the air, and crashes to the ground. It takes no damage, as it was less than 10' high. This was the final ruling:

The effect of knocking prone a flying creature is that the creature crashes to the ground (as stated in the DMG). After that, the effects follow the DMG and PHB rules for falling. Whether or not, the creature is ACTUALLY prone after crashing depends on if it takes falling damage or not. The power causing the flying creature to be knocked prone only causes the creature to crash, but not necessarily to be also prone (unless it also takes falling damage from the crash).