I was that
9 year old, and I can
assure you I
was bored. Another really 'funny' trick we used to pull off was to write a
BASIC program that would sound a high
ear-piercing tone. I would then add a line like
FOR A = 1 to 25000: NEXT
and then lock the computer (on a
Commodore 64 you would do something like POKE 808,202) and run the program.
I remember that I once
leisurely descended the building from the 5th floor down (by the
elevator), and heard my sound just as I reached the bottom level. Ah,
those were the days.