OMG.... i updated my OS X updates and installed macjanitor... I installed from the updates quicktime. Then i walked away from my PB for bout 10mins... my PB went to sleep on its own... then i woke it up by touching the keyboard. All i saw was the screen flashing...and i couldnt do anything because i couldnt see anything but flashing...i had to shut down the computer...and now i'm using it and everything seems to be running fine... Anyone know what happened??? I'm scared something went wrong!