Hmm... This example is a bit tricky to grasp (for me) especially as we are dealing with the past test first "натворил" and then the present "льёт" which I don't think would happen in English anyway "What did he do?" "He eats fish" would sound completely strange.
My example we are talking about two things in the future, one which is imperfective "what will we be doing with this (будем делать)" and then an answer which is perfective as if it is an action to be completed. My question is would there be any difference atall, if the perfective was used in Finn's question, and why was this choice made in the translation.
And to the other fellow: Время Приключений. Книга Первая, chookandgeek.ru, купить, не дорого
This is the book :P