The 1994 film 'Speed' is often cited as the perfect 'high-concept' blockbuster. A high-concept film is one where the entire plot can be summarized in a single sentence: 'A bus must stay above 50 mph or it will explode.' This simplicity made it incredibly easy to market. Starring Keanu Reeves and Sandra Bullock, the film was a surprise hit, grossing $350 million on a modest $30 million budget. It relied on relentless pacing and practical stunts, like the famous 50-foot bus jump (which was done for real with a modified bus). It turned Sandra Bullock into a household name and proved that a simple, well-executed idea was more powerful than a complex plot in the blockbuster world.