Sentence 1: Joe broke his leg playing soccer. 
 Sentence 3: When he went back to school all the kids wanted to sign it 
 Sentence 4:  All day people stopped him to add something to his cast 
 Sentence 5:  It was full from top to bottom by the time he got home 
 Option 1: He wouldn't let anyone sign the cast. 
 Option 2: He was in a full cast.