It's often the smallest accomplishments that summon the most joy: Successfully skimming rocks on the sea. Throwing your rubbish in the bin from meters away. Managing to get your dodgy shower to the right temperature without scalding your testicles.
But none of these frisson-inducing pursuits are quite as satisfying as hurtling a perfectly crafted paper airplane through the sky.
And it's also soul-nourishing to watch someone else do it, too - especially someone as good as this Japanese student, who has somehow managed to create a paper plane/boomerang hybrid that soars with the grace of an A4 eagle.