Can someone please tell me more?

K, so I was sparring with a friend of mine and it turned out to be tie, then two weeks later we sparred again and I won easily. Now don't go saying that some people get better really quick cause I didn't practice at all, not once. Not only did I win easily I was also absorbing his chi whenever he struck me, I wasn't meaning to do that it just happened. What want to know is how is it possible to become stronger without practice and why is it I can absorb chi without meaning to. And don't tell me chi doesn't exist and crap like that or that my friend just got worse cause he practices everyday.