Couldn’t get much simpler. Three old guys and the kid drag the chain up and down the garage ramp for 45 min. Actually it was a Tabata like sprint drag. The Pax each took hold of the ends of the doubled chain and a third grabbed the middle. Then the ends sprint dragged past the middle til all their chain was stretched out. Then the middle sprint dragged between them till the chain pulled taught. Then repeat. It took 4 alternating drag tests each to get to the top. The odd man out lunged or sprinted to the top where all rotated and repeated to the bottom Ritate and back to the top. After 45 minutes of that mission declared accomplished

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