What was the troll roleplay incident? I never understood it

FLARP was a roleplay game played by Team Charge (Aradia and Tavros) and Team Scourge (Vriska and Terezi).  Vriska took the game too far and controlled Tavros into jumping off a cliff which paralyzed him.  To get back at Vriska, Aradia summons the ghosts of all the trolls Vriska has feed to her lusus to haunt her.  In retaliation Vriska controls Sollux and forces him to kill Aradia.  Terezi, in trying to get justicecontacted Doc Scratch to tell him that Vriska had one of his cue balls.  Doc Scratch then made the cue ball explode making Vriska lose her left arm and eye.  In revenge Vriska mind controls Tavros, making him use his psychic powers to control Terezi’s unhatched lusus into telling Terezi to go outside and look into the Alternian sun which then blinded her.