"...shocking the area with a lawnmower spark system..."

OUCH!!! I have a pretty good resistance to electric shock (I used to be able to max out those things in the penny arcades). One of the hardest shocks I have ever suffered was from a law mower sparkplug, that sucker almost put me to my knees. I was standing on a wet sidewalk at the time, maybe that had something to do with it...