He actually thinks that the mail box can speak in a Russian accent...

CHANCE TO FREAK OUT THE MAIL MAN WITH MY CREEPY ABILITY TO THROW MY VOICE IN ORDER TO MAKE HIM THINK THE MAILBOX AND LETTERS CAN TALK IN A RUSSIAN ACCENT; ME WHO JUST LEARNED VENTRILOQUISM AND VOICE IMPRESSIONS WITH THE AID OF AN ACCENT COACH AND WIKIHOW