“I did, however, learn the subtle art of pushing a wheelbarrow full of rubble up a plank, to tip into a skip: take it too slowly and you’ll lose momentum and fall off, start to tip too early and you’ll never make the summit, fail to commit and you’ll get pushed back down by the weight, let self-doubt creep in and you’ll end up on the ground covered in bits of rock. The same rules, incidentally, apply to cycling.
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https://www.theguardian.com/commentisfree/2019/jul/30/father-building-site-teachers-cv-job-hard-work