MIAMI, FL — Failing to learn from the example of Kiera Wilmot in Bartow, FL, a Miami student, 16-year-old Gabriella Silva, arrived at Vargas High School this past Tuesday with a water bottle filled with a mixture of household cleaning products, capped with aluminum foil. A reaction between the chemicals in the cleaners and the aluminum foil produced hydrogen gas and a resulting pressure build-up inside of the bottle. Eventually the top popped off in a firecracker-like explosion with a