Something I have done before is wire someones bed to give them a nice shock.

Something I have done before is wire someones bed to give them a nice shock.

It was done as follows:

strip some stranded wire and use the wire to form a grid under the top sheet.
it works best to have this grid look like fingers that interlace but don't
touch.

this was then connected to the 110 V side of a texas instruments calculator
transformer. to the calculator side of the transformer add a 12 or 24 Volt
DC supply (i can't remember which we used) connected through a normaly
open switch.

then press the button rapidly to cause a transient in the transformer.

It is funny as heck to watch someone wake up as they are getting the
shock. if you stop while they are still partially asleep they really
have trouble figuring out whats going on.

i'm sure you could automate the process so the person has just enough time
to fall a sleep before the next shock.