Simple, just let me explain:
Berserk Digivolution is an uncontrollable Mega-Rank Digimon born of absolute insanity, blind rage or crippling fear. It is not a permanent form, and it's never pretty.
Depending on what caused your digivolution, it can take multiple forms.
Insanity causes you to digivolve into something crazy, uncontrollable with a thirst for chaos.
Rage causes a digivolution into a demon spawn, wanting nothing but to kill and destroy everything that's in their line of sight
And Fear causes a digivolution that wants to push everything away before they can be further harmed, usually sobbing uncontrollably or screaming until they go mute.
The further they've been tormented or abused, or the amount of hatred they've stored up, the more powerful it becomes, and the longer it lasts. The one thing that secures a Berserk Digimon to revert back to its Rookie form is to be calmed, recognized as who they were, and not responding with fear or hatred.
I hope this helped! See ya!
Listening to: Gardinelia by Lamb.
Watching: As told by Ginger (I'm such a kid)
Eating: Ham sammich
Drinking: Grape juice