Another one of those "Don't try this at home" threads.
Then there is the EMP gun.....salvage a CRT tube from an old TV, knock off all the glass and replace it with a shielded tube, and set up a capacitor with a solid state relay to power......
"That's all I got to say about that.", Forrest Gump.
Once upon a time a dude I know of made himself sick with a similar device he built. He didn't understand why he got sick, but once the hospital figured it out he got a visit from.....weeelllll...he ain't supposed to do that no more.
It is a quick and silent method to kill rats at the local dump, however.
I guess the Department of Homeland Security is coming to lobotomize me now, or the Defense Department will be hiring me as a consultant.