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.
Physical Explosions. Physical explosions are those in which no chemical or nuclear reaction occurs. The most frequent example is the rupture of a vessel whose contents, either gas or liquid, exist under high pressure. If the containing vessel bursts, its contents are free to expand and a shock wave is formed.