tying knots. All you need is a couple of pieces of string to get started. The right knot, well tied, is like a good friend - you can count on it. Shipyard workers sometimes make fun of how inexperienced mariners tie up their boats to a dock with “if you can’t tie a knot, tie a lot!?” (full disclosure, I am a sailor).
someone else mentioned sign language - that is also extremely useful sometimes! My wife and I learned it when we learned to SCUBA. We do not have any deaf friends, but sometimes you meet a person who is reliant on sign, and if you can at least spell out some words, ‘they are so grateful’.
That is about 2.2X the range of a Tesla, so figure 2.2x the battery: 68kWh x 2.2 = 149.6 kWh. Divide that by 1/6 hour: 900 kW(!) at 240V about 3750 amps. We gonna need a bigger charging cable! lolz