Tremmel+Exaggeration

Exaggeration
The Exaggeration principle is an increase of a typical action to an abnormal size this would relate to a character expressing their emotion, moving, or over reacting to a conversation with another character. This principle is most commonly used in cartoons targeted towards children

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In this video the character is rapidly moving his feet while standing on his tip toes, it is over exaggerated thus making feelings easily detectable.