You're going to find that it IS static electricity.I have a big problem with it,and I don;t know why.From the time the leaves fall,until the ground gets muddy in the spring,I have a terrible time with it.I have gotten into the habit of slapping the metal doors in my house before I grab the knobs.That snap on the palm of my hand hurts a lot less than the snap on my fingers.Same thing with the stove,fridge,washer,dryer,anything big and metal in the house.Most cars are the same way,except for my 96 Dodge truck.For some reason that one never bites me.I was sitting in a 54 Studebaker this morning,when I got done twisting around and went to jump out I grabbed the windshield post and got belted.I'm the only one here it happens to.Think about all the cars in the 60's that ran around with two straps hanging down in the rear.When you bought a new car then the first thing you did was to run to Sears or Western Auto and get a set of seat covers to protect it.One slide across them and you built up quite a charge to release.Some people build it up,and some don't.I have a two foot flourescent light in the headboard of my bed.This time of the year I can slide my hand over it and it will glow.It won't throw any light,it just glows enough to show where it is.My wife rubs her hand on it and it stays dark,no glow at all.She also never gets shocked in the house either.