@edgarblythe,
Wow, edgar. I had no idea that Harry had folk singers at one time. Love that Red Rosy Bush by them.
For some reason, Darius Rucker's This reminded me of the following experiment.
http://www.youtube.com/watch?v=boK5XMOLkWw&feature=related
It doesn't take long for the effects of the potion to wear off, and the four guests find that they are old again. Dr. Heidegger does not regret the spilled elixir; he has learned his lesson by watching his guests, and would not drink the water for anything. The guests, however, have learned nothing, and vow to travel to Florida, find the fountain of youth, and drink from it day and night.
In other words, if we would have a second chance at reliving our lives, we'd still make the same mistakes.