Sentence 1: Jack was playing on a neighbor's trampoline. 
 Sentence 3: Jack was in a lot of pain from the fall 
 Sentence 4:  He went to the doctor and got an x ray 
 Sentence 5:  The doctor said Jack's arm was broken in two places 
 Option 1: He fell down and hit his arm. 
 Option 2: He fell and broke his leg.