The gang makes it to the lab looking a mess - blood dripping from their eyes, mouths, ears et al. Marcus solves the riddle: fish! As he reaches for the antidote, Chico kicks his hand away because assholes never tire. While everyone is basically dying, Maria manages to get up, snatch some leaves from the life-saving plant and feed them to her friends. She hesitates for a moment before feeding Chico and we don't blame her.