High school senior Emmanuel Williams and 24 other students were riding a school bus in Tacoma, Washington earlier this week, when the bus began to swerve ominously. Williams jumped up, found the driver nodding off and woke him up, preventing a tragedy on a busy interstate highway.

The driver's now on administrative leave while the school district investigates the incident. The bus, with 25 students aboard, had just merged onto an interstate when the 65-year-old driver started losing consciousness. As the video shows, Williams, 17, ran over and made sure he remained alert long enough to bring the bus in for a landing, or whatever buses do.