Fly inside cavern. Is this a cheat?

[FORDPREFEKT]

Several times i seen the character - human proto paladin who flying INSIDE cavern. Also he call the fly mount inside there. I cant do good screenshots bcose he too fast inside. If he cheater - how i can get proof that will be enough?

[angrylol]

What cavern dude?

[lemonpiglet]

Where are you talking about exactly? Some caverns you can fly in, it depends on whether the game wants you to or not.

[FORDPREFEKT]

i tell about SIT IN FLY MOUNT inside cavern. My character cant do this.