Cecil, the Angry Postman - S1.E18

When Jesse writes a love letter to Diego she never plans to send and little John sends it she tries to retrieve it. But she angered the mailman because he doesn't put the mail in the right mail slots and now to anger her he refuses to give her the letter she wrote to Diego because it's addressed to him not her. She then tries to put her arm in the mail slot and retrieve it but she gets stuck.