What is the first thing you see in an emergency that is also something you only see twice in a lifetime?

Why this works

This riddle plays on the dual meaning of "emergency" and the phrase "twice in a lifetime." The first thing you see when you look at the word "emergency" is the letter 'e,' which appears at the beginning. Additionally, the letter 'e' is the most frequently used letter in the English language, but in the phrase "a lifetime," it only appears twice—once in "lifetime" and once in "the." This clever wordplay invites you to think about letters as both visual elements and components of words!