We all saw Alexis running upstairs, yelling: "Oh, my God! Cristal!" We assumed she tried to rescue arch rival Cristal, whom she'd locked up just after their catfight. But was she? Rescuing Cristal? Maybe she tried to rescue... Krystle, the little dog she brought to the Carrington mansion some episodes ago? I haven't seen the little beast since then (or I just didn't pay attention), but it could be that she brought Krystle to the wedding and - unseen by viewers - locked him/her up temporarily until after the festivities were over? Just so the dog wouldn't be in the way? Thinking about this at the time of the fire, she ran upstairs to get the dog out. So what we heard could've been: "Oh, my God! Krystle!" Maybe she saw that the dog had died.