It's not that impressive, I was mostly lucky as my learning of them was highly incidental. Frequent holidays (3 times a year, usually) in Andorra as a kid and parents who suck at foreign languages meant I was pretty much highly fluent in Spanish and competent in French by the time I was 10. The only children's channel I had on TV was Cartoon Network which was 100% in english with no subtitles at all but since I watched like 2 hours every afternoon starting when I was 6 I was also highly fluent in english by the time I was like 12 or so. Then there's my primary language (portuguese) which I of course am also fluent in and then there's German which I was kind of forced to learn due to my aunt moving to Switzerland when I was a baby and my cousins being rubbish at all other languages gorwing up. They spent about 1 month with me every single summer, so, by incidental exposure, I ended up learning it. The 6th language (Italian) was pretty easy since it is highly similar to Spanish and Portuguese, both of which I've completely mastered both in writing and orally.
I dabble in Arabic and Japanese, with enough conversational skill to get by and get my basic point across but no real freedom of expression and a complete lack of ability when it comes to the writing, since I can't read or write anything in either language.
I suppose circumstance dictated the way my brain perceives language in general. All of the above combined with the fact that we subtitle everything except young kid's shows in my country plus the complete lack of localized video game content in my native language meant I kind of had no choice but to be multilingual.
Wish I could say I worked my ass for it, but I really didn't, languages are just highly intuitive for me for some reason, it just comes easy.
Yep, it's exactly the same for me.
Now you've just impressed me even more :-P