Take your time with the Mac Firmware update
Update No. 2: Apple provides a Firmware Restoration CD in case something goes wrong during the update. Sorry I found this only now...
Update: Had nothing to do with the CD falling on the keyboard, that was a coincidence! It was a buggy update app - Zera run it again the next day and it froze a second time exact same..! Off to Zurich the computer went again.
Poor Zera! While the Firmware update (available through Software Update) on her MacBook Pro was running, she opened a letter and a CD fell out onto the keyboard, hitting the Enter key. This killed her Mac completely - nothing but a black screen after that (and off to Zurich for emergency repairs...)! Is that bad luck or what?!!
Firmware updates are always a tricky issue and you MUST take your time and utmost care while running them.