Sentence 1: Bob was eating dinner when he felt something funny in his mouth. 
 Sentence 3: He spit out the piece and found out it was part of his tooth 
 Sentence 4:  It did not hurt so he kept eating 
 Sentence 5:  About a week later his tooth felt funny because it was so jagged 
 Option 1: While chewing he looked down at his dinner and saw ants. 
 Option 2: As he was chewing he bit down on something hard.