Re: "Neat" Pictures
Oh hey, I know!
"Making UFO's" is what I learned it as. You take a large garbage bag, two 18"-24" sticks (laths, or balsa wood, is best), and 4 or 5 (or more, but not too many) birthday-cake candles. Attach the sticks to each other in a X shape, put the candles on, attach to the garbage bag. One guy holds the bag open and upright (opening down), another lights the candles. First guy waits for the bag to fill with hot air, then releases it. It floats off, lit up. Cool, and can freak the unsuspecting.
Though these guys are using some other source of light and heat, and seem to have something a bit bigger than garbage bags available. Still, same principle.