A guy enters a Home depot and tells one of the employees that he wants to buy an electric saw to cut down trees. The employee says "I got just what you need! Look at this beauty, it can cut down 100 trees a day!" The guy likes it, buys it and goes home.
The next week the same guy comes back to Home Depot with an angry face and tells the employee "This electric saw is terrible! I could only cut down 50 trees a day!". The employee answers "I'm sorry to hear that, sir. Look, we got an even better option: this new electric saw that can cut 200 trees a day!"
The man's face lights up, he returns the old electric saw and buys the new one.
One week after he comes back with an even angrier face and demands the employee: "You told me I could cut down 200 trees with this saw, but I can only cut down 100! I want my money back!". The employee apologizes: "I am truly sorry to hear that. Look, we just got this brand new, state-of-the-art electric saw that can cut 400 trees a day!". Again, the guy returns the old saw and happily buys the new one.
One week passes and the guy storms into Home Depot. He yells "I am fed up! No matter what I did, I could only cut down 200 trees a day!"
The employee says "ok sir, let me have a look at the saw". So the employee takes the saw, and cranks it up. The sound of the motor can be heard throughout the whole shop.
The guy looks at the employee with disbelief and asks "What the hell is that sound?!?"