Jukka balances Pilvi using various fluids
Here's a description of the contestant's attempt. Someone's probably working on collecting some images to illustrate it.
Jukka puts several plastic water coolers filled with water, 2 litre soda bottles, and fire extinguishers on the seesaw.
This collection of items turns out to perfectly balance Pilvi's weight.
(Written by TRoosevelt1776 and proofread by Karl Craven)