In this fiery backyard experiment, Matt tests a variety of common decking materials to see how they respond to ember ignition. Using fire starter cubes on different wood and composite samples, the test reveals dramatic differences in burn behavior. Class A-rated materials like E-Pay and advanced PVC resisted flame spread impressively, while some class C-rated or unrated products caught fire quickly, even igniting the structure underneath. Wet pressure-treated pine held up better than expected. The takeaway? Fire-rated materials can be crucial, especially in high-risk areas. Matt emphasizes caution with outdoor flames and encourages exploring more content for building tips.