Sentence 1: Susan and Tim were hanging out and joking outside. 
 Sentence 3: They could hear mountain lion cries and close too 
 Sentence 4:  The couple panicked and hurried back to their house 
 Sentence 5:  They were always worried about the big cats from then on 
 Option 1: They were having a good time until they heard a noise. 
 Option 2: They were having a good time until they heard a dog.