Possible Clues:

• 'I ___ an animal!' ('The Elephant Man' line)
• Cry preceding 'Are too!'
• Denial without a subject?
• Weak line against a bully
• 'Are too!' rebuttal
• Recess rebuttal
• Response to "Are too"
• Answer to 'Are too!'
• Natan's response to 'Natan is just a silly booger eater!' maybe
• Schoolyard comeback