Breakdown of Я прочитал текст впустую: вся информация вылетела из головы.
я
I
текст
text
информация
information
прочитать
to read (perfective)
Questions & Answers about Я прочитал текст впустую: вся информация вылетела из головы.
Why is the verb of motion вылетела used for forgetting information?
вылетела is the past tense of вылететь (to fly out). In Russian, verbs of flying are often used metaphorically to describe thoughts, words, or time moving very quickly. Saying information flew out of the head expresses that it was forgotten suddenly and completely, as if it had wings and simply escaped.
How does the prefix on вылетела work with the rest of the sentence?
The prefix вы- indicates motion out of something, and it pairs perfectly with the preposition из (out of). This combination strictly follows the physical rules of verbs of motion, moving from the inside of a container to the outside, even though the usage here is purely metaphorical.
What is the origin of the adverb впустую?
Could I say от головы instead of из головы here?
No, because от implies moving away from the surface or outside of an object. из means moving out from the inside of an enclosed space. Since thoughts are contained inside the head, you must use из, which also correctly matches the вы- prefix on the verb.