The moment the wyvern went just over the cliff, it seemingly disappeared under Dustin, and he started falling towards the cloud until he went completely through it.
He could have gone down on the wyvern's back, as that was the better option in case there was no landing spot, but seeing the attitude of the creatures around here towards the wyvern and him, it seemed like the creatures here just somehow new the wyvern wasn't part of them, even though they look the same for the same part, as all the monsters Dustin had seen within the volcanic region were draconic in appearance.
The monsters here seemed to naturally be pissed off by their presence, and though he had only faced a handful, he could tell something was off about them.
When Dustin got to the floor of the cliff that seemed to take almost a minute even though he was free falling, he immediately tried to hide himself amongst some rocks behind the place where all the monsters were gathering.