Instantly, you feel knowledge being pressed out of your brain. The old man didn't say your were going to be dumb. But you remember your dad look sad as you brought home Science trophies, you wouldn't be a geek, but you'd have average, normal, teenage guy intelligence, able to burp and relax, and have a normal discussion with your dad.
But that was only the very beginning of the changes, and you felt more changes happaning to your mind and body...