Oh, I love that! It's like - You can't unsee what you've seen.
  The belll is even better because of "sympathetic vibrations": If
  you have identical bells and they're within "hearing" distance
  of each other, you ring one bell, and the other one rings as
  well, even though it was never struck. A good idea "rings"
  sypathetically in the mind of another, so once that idea is "out
  there", it sympathetically resonates with those of similar mind.
  See, it's all about "good vibrations" :-) "