Sentence 1: Gus was out hunting birds in the woods. 
 Sentence 3: The birds flew away when the rock came after them 
 Sentence 4:  Gus raised his gun at the birds 
 Sentence 5:  He fired twice and took out both birds 
 Option 1: Gus had an accident with the gun and shot himself in the foot so he quit hunting after that. 
 Option 2: He threw a rock at a bush he thought that contained birds.