Well I installed CM10 and tried to flash the Matr1x kernel and now when I went for the reboot I get a black screen and the capacitive buttons only light up. Can't really do much, I can get into recover and thats about it. I'm still novice and learn with trial and error (like in this case...)
Edit: Okay got it back to stock. Panicked first before really thinking about solutions. Go Nexus phones!