Listen to the song in your heart not the voices in your head - Homer Simpson
The human brain has this weird ability to invent noises which auger impending doom. I think its some caveman thing aimed at spotting the tread of sabretoothed frats over a background of mammoth ruttings, but it becomes a PITA in modern times. I can't think of an actual problem that was ever announced by anything except a lack of go, appetite for fluids or the bikes desire to fall over in corners.
Andy