Mon Aug 01 2005 12:37 (Riana) Geeks, Fire, and Dangerous Things:
Seth and I were at Defcon in Las Vegas this weekend. Seth got our friend Praveen to bring Seth's giant Fresnel lens to the con when Praveen drove out on Saturday. The Fresnel lens is roughly 1 meter in diameter. On Sunday afternoon, as the con was winding down, we took the lens (wrapped in a black sheet for safety) out to a quiet back lot behind the convention hotel and, though the sky was overcast with a thin cloud layer so that we could not focus direct sunlight through the lens, we set some stuff on fire.
Seth brought four pairs of welding goggles and two pairs of sunglasses for the group, plus safety gloves for whoever held the lens. It was about 102 degrees out, scorching hot even with the clouds, but before the heat drove me back indoors, I watched Seth and David Weekly burn a brown spot into the side of an aluminum can; turn a piece of wood to charcoal; set aflame and burn through a handful of dry grass; and light an onlooker's cigarette (placed on the ground, not in his mouth!). They also tried unsuccessfully to melt a penny and a quarter. I guess it's not as easy as I thought to burn through your money in Las Vegas.