Chainsaw for Cutting Tree Branches

A farmer is looking to buy a chainsaw for cutting tree branches The dealer tells him, 'I think you should get our high-end model. That chainsaw will cut a hundred branches in one day.'
The farmer buys the chainsaw and begins working on the tree branches. After cutting for half a day, only two branches falls down from the tree. He thinks there might be something wrong with the chainsaw. 'I have to begin with this in the morning and cut all day!'
Next morning he gets up at 4 a.m. and cuts till dusk, and still he only manages to cut four branches. He is now convinced that the chainsaw doesn't work correctly. So next morning he takes the saw back to the dealer and explains that maybe it is not the best chainsaw for cutting tree branches. The dealer is astonished, removes the chainsaw from the case to have a look at it, but there is nothing visibly wrong with it. So he starts the chainsaw to see if it works. At this point the farmer asks, 'What the hell is that noise?'