Sentence 1: Greg was going for a nice walk in the mountains. 
 Sentence 3: He decided to take a hidden trail down the side of the main one 
 Sentence 4:  He started to slowly look around and head back to the main trail 
 Sentence 5:  Through the bushes Greg Spotted a mountain lion and ran back to safety 
 Option 1: He was too tired to walk and stopped. 
 Option 2: He was enjoying nature and all its glory.