"Jump-starting a car.

Park close enough that the cables will reach.

Red clip to the dead battery’s positive terminal (also usually red).

Red clip to the good battery’s positive terminal (red again).

Black clip on the good battery’s negative terminal (either black cover or uncovered).

Black clip on a piece of exposed metal on the dead car’s engine block.

Start the good car and wait a minute or two, then start the dead car.

When disconnecting, don’t let the positive and negative clips touch each other."

"I think the exposed metal thing is what trips people up when they don’t know how to jumpstart, crossing their wires (both ways).

Truth is, on any car made in the past 20 years, or really, any current modern battery, you’re totally fine connecting red to red, black to black. I’ve done it many times, I know plenty of people who have done it, and I’ve talked to a couple of mechanics about it who respond with, “What? Why would you bother with exposed metal?”"