It is what it is. Person 1 will post a seemingly normal one-sentence story, Person 2 will post a humorous, shocking, or terrifying plot twist of Person 1's message.
example
Person 1: Henry treats his girlfriend like a princess.
Person 2: ..so he married her off to Poland to strengthen their political bonds.
I apologize for any reposts I looked up "lot twist" on the forums but nothing came up.
But, Dave is a dirty little evil kid. He didn't help his counterpart...
which resulted in Evad being torn into itty bitty pieces and eaten raw by the goblin.
Evad couldn't take the stress of Dave's anger management issues. They had talked over this a million times, but no therapist could help Dave. Evad runs away from home to live a better life.
Dave suddenly starts talking. Not even Dave who is now manic thought it would come true. Dave talking? Impossible. But that feeling soon faded. Dave turned out to be a friendly fellow. They became good friends. Dave forgot all his worries. After a while Dave forgot about Dave and he disappeared from his imagination.
And then Dave was created by mixing dirt with some weird part and a formula, it appears than he is a golem, sort of replica of Dave but who have for mission to execute order of his Dave master