A man goes into a B&Q DIY superstore.
Man: I'd like a chainsaw that can cut down eight trees in an hour.
Assistant: I have the very one for you, sir. Top of the range.
Man: Thanks, I'll buy it
THE NEXT DAY.....
Man (furious): That chainsaw you sold me is bloody useless. It took me all day and most of the night to cut down one tree.
Assistant: Oh, I'm sorry to hear that. Let me have a look at it. I'll just start it up.
Man: What's that buzzing noise?