The triboelectric effect. Otherwise known as static electricity. When two objects are in contact with each other and then separate, depending on the materials, they swap electrons and one will have a higher charge than the other. This effect can be enhanced by rubbing. Like when you slide off the seat getting out of your 4Runner. The human body model for testing electronic devices for electrostatic discharge is represented as a capacitor of 100 picofarads and a 1500 ohm resistor charged to a voltage of 4,000 to 35,000 volts. When touching an object this energy is discharged in less than a microsecond. Not too many joules but you feel it when it discharges to ground or your car door. And it’s possible to ignite gasoline fumes, so discharge yourself before pumping gas. After getting out of the truck you can try to hold your key in your hand (or some other piece of metal if you’re keyless) and touch it to the door lock. The zap isn’t so painful that way.
This effect is enhanced in dry air so that’s why you’re more affected in winter. :flamethrwoer2:
