The robots continue their mission to discover what it means to laugh by trying impersonating various robots.
Impression (noun)
To mimic a person or animal's form, mannerisms, and or voice.
de los gestos, ademanes y voces 
de alguien o de algún animal.
de los gestos, ademanes y voces 
de alguien o de algún animal.
Imitação, s.Imitar a forma, os maneirismose a voz de um animal ou pessoa.