In the scene where Buddy the elf comes in to his father's office, Miles Finch, the notorious ghost writer, becomes increasingly annoyed with Buddy's insistence that Miles is an elf. Miles then gets up onto the desk and charges toward Buddy. Right before Miles jump kicks Buddy, there is a shot of Miles from the back. However, he is no longer a 3 foot tall little person, he is now at least 5 feet tall. You can clearly see the distinction between Miles and the stunt double.