A Finn goes into a shop to buy a new saw. He asks the salesman if the new saw will cut an trim 8 cubic meters a day, the salesman says no problem. He buys the saw and takes it to work.
A week later he returns to the shop and say the saw is no damn good. No matter how hard he worked he could only manage 7.5 cubic meters in a day.
The salesman says perhaps he was not using the saw properly, and that it was a question of technique. The salesman pulls the rip cord and starts up the chainsaw and the Finn jumps back in astonishment and exclaims
"What the hell is that noise?"