Bill Clinton visited both the Grand Canyon (in 2000) and Yellowstone (in 1995). President Clinton stayed in the Mary Colter Suite of the Grand Canyon's El Tovar and had lunch at Yellowstone's Old Faithful Inn. President Clinton and the First Lady also took a stroll around Old Faithful Geyser.
Exploding Water in the Microwave. It's practically an urban legend: a man heats water in the microwave for a cup of instant coffee. While taking the cup out of the microwave, he notices the water doesn't have any bubbles...at which point, the water boils up and explodes, giving him burns on his face and hands.
Lithium experiences the mildest reaction with water, while francium produces the most violent explosion. Lithium floats on the surface of water, where it begins to fizz as it slowly releases hydrogen and eventually dissolves. The next element in the group, sodium, also fizzes in water, but the reaction generates enough heat to melt the metal. The liquid sodium forms a ball that rapidly moves around the water's surface as it dissolves. This reaction also produces a small orange flame at times, as the reaction creates hydrogen gas that the heat ignites.