Why did my boiled egg explode?

Online Answer
When the egg yolk is disturbed by an internal or external stimulus, the pockets spontaneously boil, thereby releasing considerable energy (i.e., an explosion).
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The ice bath will cool the eggs quickly and stop the cooking process. The ice water will also cause the egg to contract and pull away from the shell, which will make it easier to peel. Let the eggs sit in the ice bath for at least 5 minutes.
Parboiled potatoes are good for up to one to two days after you remove them from boiling. ... Simply parboil your potatoes, wrap them in an airtight container, and place them in the fridge as you would any leftovers.
Hard-boiled eggs should be refrigerated within two hours of cooking and discarded if left out for more than two hours at room temperature, said Rubin. Her recommendation is to leave them in the fridge in their shells for optimal taste and quality, and to only peel them when you're within minutes of eating them.
However, you can also leave the potatoes intact when you boil them. Other tips from the Idaho Potato Commission call for you to boil whole potatoes. You should boil potatoes with the skin because this will allow the potato to keep more of its flavor and nutrients than if you were to cut it up into pieces..
The Main Risk of Reboiled Water Reboiling water drives out dissolved gases in the water, making it "flat." Superheating may occur, making the water hotter than its normal boiling point and causing it to explosively boil when disturbed. For this reason, it's a bad idea to reboil water in a microwave.