CAPS LOCKED ON

Had one of those strange occurrences this morning whilst working on my dissertation in Word, I hit the wrong key(s) which keys I have no idea and suddenly I AM TYPING IN CAPS AND NOTHING I DID WOULD TURN IT OFF. WHICH WAS A BIT OF A BALL ACHE AS I WAS FINISHING OFF A DRAFT OF MY DISSERTATION AND ABOUT TO DASH OFF TO A TUTORIAL. Enough of that! I hastily Googled "CAPS LOCKED ON KEYBOARD" and tried the first option in the list. They suggested holding down both shift keys at the same time and count 5 - BINGO it worked!