The G5 was down

An odd thing happened to me as I was coding I got locked out of all my applications, no control with the keyboard or mouse.. odd. Anyways, I powered down the machine and booted in to safe mode where I was able to disable any startup items – then I rebooted normally, unfortunately I encountered a flashing icon with a graphic of the earth in it, nice. After a little research with my co-worker we found that on startup if you hold down the option + command + p + r keys, then listen for the startup chime for 3 times, then release this will clear out your PRAM. So, fortunately the machine seems ok, unfortunately I have to get back to work.