- One person begins with a sentence (e.g. One day Little Johnny walked to the local shoe shop).
- The next person tells of something unfortunate that happens (e.g. Unfortunately, Little Johnny was hit by a refrigerator.).
- The following person contributes a fortunate event (e.g. Fortunately, the refrigerator was made entirely of marshmallows), and the process is repeated.
So here's the starting sentence:
Once upon a time, programmers were having a good time posting on CodeCall forums.