Sentence 1: Bob went to the barber for a trim before prom. 
 Sentence 3: As he was doing it the barber sneezed 
 Sentence 4:  The razor went up the back of Bob's head 
 Sentence 5:  He had an almost bald streak down the center of his head! 
 Option 1: He just needed to shave his hairline in the back to finish up. 
 Option 2: He just needed to trim his hairline with scissors.