Damn...you learned years and years of sheet music reading ability, the range for all octaves, quarter, whole, half, eighth, sixteenth, thirty-second notes/rests, the entire Italian music vocabulary, all 8 billion major/minor and then some scales, the meaning of ALL time signatures, and ridiculous amounts of music theory in three hours? That's crazy, I didn't even think any composers could do that .
As for me, I played trombone in highschool and was section leader (surprisingly because I had zero discipline/responsibility) and now I dabble around with piano/bass. I have a piano that I got for free last year and it's been sitting in my living room, so I fuck around with it. I figure once you get down piano you build a basis for most instruments. The two things I find difficult about it are the fact that two hands and feet are required to play and the treble clef, being trained in trombone I know bass clef like it were my brother .