Are You suprised ?

5.4. Peculiar Use of Colloquial Constructions
Ellipsis is a typical phenomenon in conversation, arising out of the situation. It becomes a SD when it imitates the common features of colloquial language.

Ellipsis is a pattern, in which one or more members of the sentence are omitted but they can easily be restored by the context. This typical feature of the spoken language assumes a new quality when used in written language. It is characteristic of a dialogue to create the effect of naturalness and authenticity of lively emotional speech.

E.g. See you tomorrow. Had a good time. You say that?
Aposiopesis (or Break-in-the-Narrative) is an unfinished syntactic structure used to show great excitement, strong emotions, etc. paralleling the person's speech; or his deliberate stop in the utterance to conceal its meaning; to show unwillingness to go on or to suggest that what remains unspoken can be guessed. Aposiopesis is mainly used in the dialogue, and is graphically marked by dashes and suspension marks (dots).