Explore the world of petrol-powered machines in this 33-minute video from The Royal Institution. Discover how internal combustion engines power many of the tools that make our lives easier. Follow along as Andrew Szydlo demonstrates the workings of a manual sewing machine, petrol lawnmower, and chainsaw. Learn about two-stroke and four-stroke motors, and witness fiery demonstrations explaining why petrol is used as fuel in engines. Gain insights into the combustion process and see a more explosive use of petrol. The video concludes with a glimpse into Andrew's lockdown gardening projects, offering a comprehensive look at the practical applications of petrol-powered machines in everyday life.