the timing was marvelous for me on this one. Listening to it scratched a mental itch that I've had for 20 years now.

When I first heard this on the radio, I was completely surprised by the disturbing twist at the end - this must be why it stuck with me for so long. I can even remember where I was and what I was doing when the stranger revealed the true function of the pills, but I don't remember anything else leading up to that point.