If someone wonders what is "Sisu", well, it's the finnish version of "guts" or "balls", but it's actually 80% madness, 10% jackassery and 10% finnish mythos incomprehensible to anyone, including finns themselves.

Great things were done thanks to the finnish sisu. Like, cycling uphill on an inclined slab of ice without studs. Like those kids I met on Kannelmäki.