Sentence 1: Jim was walking home from school. 
 Sentence 3: He figured he could walk a bit longer though 
 Sentence 4:  As he stepped off a curb, he tripped and fell 
 Sentence 5:  Jim felt silly for not just tying his shoelaces 
 Option 1: And he noticed that his shoelaces were untied. 
 Option 2: His shoelaces were tied tight.