Sentence 1: Shelly was walking down the beach looking for shells. 
 Sentence 3: She thought it was way too lovely of a day for no one to be out 
 Sentence 4:  That is when she noticed a huge wave coming for her 
 Sentence 5:  The high tide was about to hit her and she couldn't get away 
 Option 1: She started to notice that the whole beach was packed with people. 
 Option 2: She started to notice that the whole beach had cleared.