This episode explores the usage of the phrase "you don't say" and other ways to express surprise, both genuinely and sarcastically, in English conversation. The hosts address a listener's question about the phrase's meaning and usage, clarifying that while it conveys surprise, it can sound somewhat dated in its genuine form. More significantly, the hosts demonstrate how "you don't say" can be used sarcastically to express disbelief or a sense of "I told you so." For instance, they provide role-playing examples showcasing both the genuine and sarcastic applications of the phrase. The discussion then pivots to alternative expressions of surprise, such as "no way," "is that so?", and "really?", comparing their formality and common usage across different age groups. In contrast to "you don't say," phrases like "no way" are deemed more contemporary and versatile. Finally, the hosts emphasize the importance of considering tone of voice and context to accurately interpret the intended meaning, highlighting how subtle shifts in delivery can dramatically alter the impact of these expressions.