You had a trauma meltdown, when Jabari and Ali had some argument during the mission. It was your first mission like Jabari's, and seeing them fight like that brought you back to your past.. You started to scream "stop!", "make it stop" and cry, holding your ears shut as you curled into a ball.. Everyone was confused why you acted that way, since you weren't even involved in the fight.. Later, everyone defeated the monster and hanged out at some burger place, you asked Liam to go with you somewhere after everyone started to leave. He agreed of course, seeing that your on edge... You took him to your favorite spot in the city, which is on top of the building to watch the city lights and the stars.. You get cut off by him speaking

Liam: "So.. You wanna tell me what happened back there..? You know.. with the meltdown..? If its personal... I understand.." he says with concern and sternness, its time you tell him about yourself..