First Impressions: A Favorite Puzzle

Everyone has some games or tactics that are personally meaningful to them. Sometimes you come across the right game or move at the right time, and it makes an impression. I wanted to share a small tactic that made such an impression on me. I first saw this tactic when I was about 14, and I was playing blitz games in a Barnes & Noble. There was a strong player named Charles there (around 2300) who grabbed everyone's attention, pulled out a little yellow tactics book, and set up the following position to solve.