Sentence 1: Benny was making farting noises with his elbow. 
 Sentence 3: She teacher fell sharply 
 Sentence 4:  When I helped him up, he thanked me 
 Sentence 5:  On the other hand, he took Benny to the principal's office 
 Option 1: He accidentally spit a teacher who walked behind him. 
 Option 2: He accidentally smacked a teacher who walked behind him.