I've just been reminded of a good story I'd like to share with you all.

It's a story about a mains tester screw driver. The screw driver in
question had been dropped on to a hard floor from the top of a step ladder,
so the little neon lamp inside died when the fall broke its glass shell.
Everybody say Awww !!! But hope was at hand. Yeepee!!! A local supplier
could make the screw driver work again by putting a new neon lamp inside it.
Yeah !!!!

But the screw drivers owner was a cruel fellow, and told the supplier that
he wanted to fit the new neon lamp himself. Boooo !!!! So the supplier
didn't want to argue with this cruel man, and handed over the new neon lamp
with much haste.

Now, the story takes a lighter twist here, because the mains tester screw
driver had an all-in-one neon lamp and resistor unit inside when it was new
and shiny and working, the new neon lamp only came by itself without the
resistor. The cruel screw driver owner didn't care, he just wanted his
screw driver working again, so he could jam it in things to see if it made
the neon lamp light up. He was a vicious man indeed.

The new neon lamp was installed in the handle of the poor screw driver. The
metal cap was hammered back into the top of the handle. The screw driver
was all back together and ready for its first live test. You have to
remember that the new neon lamp didn't have a resistor supplied with it.
The scene was set, the drums rolled gently in the background.

The screw driver was presented to the live mains electricity for the first
time with its new neon lamp installed and................BLAM !!!! The
cruel owner was flung off the top of the step ladder on to his back. The
screw driver had got its revenge on its cruel owner at last.

The moral of the story is "Make sure you understand how things work, before
you go trying to repair them".

The End.