After breaking away from the supercontinent Gondwana, the Indian plate raced north at something like 15 to 20 cm a year, several times faster than most plates today. It slammed into Asia about 50 million years ago. The collision is still going on at a few centimetres a year, and it keeps pushing the Himalayas upward.
On 27 August 1883, the eruption of the Indonesian volcano Krakatoa was heard as far away as Rodrigues Island, nearly 4,800 km away. Its pressure wave was picked up by barometers worldwide and circled the globe several times. The tsunamis that followed killed more than 36,000 people.
The deepest known point in the ocean, Challenger Deep, lies roughly 10,900 m below the Pacific surface. Drop Everest in and its summit would still sit about 2 km underwater. Down there, the pressure is more than 1,000 times what you feel at sea level, roughly a tonne pressing on every square centimetre.