For example: Wow, that thing is huge! It's as hard as a rock, wow! Is anyone an expert in English?
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Edited by Mad Max: 3/19/2013 11:36:29 PM"Wow" is an exclamation. It is correct to either use it in its own sentence, or separate the exclamation with a comma. "Wow! Look at the tits on that chick!" and "Wow, look at the tits on that chick!" are equally correct.