This expression came from the H-game (PC)/PS2/DC/anime Kanon. Ayu Tsukimiya's line (and probably the most famous throughout Kanon). This is her expression when she moans, or whines (like eeeehh, but more original).
Darn though. She had a sad story. One of my few favorites besides Nayuki.
Ayu: I'm cooking cookies.
Yuuichi: I bet they'll taste terrible.
Ayu: Uguu! I've learned how to bake from Akiko-san!
Yuuichi: You can't learn how to bake with just watching in a day..
..although I'll eat them if you manage to make them look good.
Ayu: Really?! Then I'll do my best!
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A mechanism that goes along with forest fires. Firestorms are large fires covering large areas.
Some area catches fire, then cold air comes in at ground level, creating high winds and fuel more flames. With this method, fires can reach up to 2000 degrees C.
It is not only by nature, but also made by man. A definite example is the nuclear bomb.
The fire that happened in Peshtigo, Wisconsin is a firestorm. Mayhaps one of the largest and deadliest fires in the U.S.
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