The weather looked a little iffy so I had filed IFR the night before. In the morning the weather was good, but I decided to fly the trip IFR anyway.
At the hold short line I called "ready." The tower told me to hold for release due to an inbound SkyWest Brasilia. Before i could say "I'll depart VFR," though, the Brasilia cancelled IFR.
Now I was in karmic debt.
Fifteen miles from the destination Center cleared me to climb so he could release a SkyWest RJ. "How about `cancel IFR'?" I came back. "Those are the magic words!" he replied, and I continued my descent.
SkyWest cancelled for me. I cancelled for SkyWest. Now I was in karmic balance.