He found a ring with a warning note about it being cursed in a little black box in the park, but fascinated with the beauty of the ring, he didn't pay attention to the warning note, and put the ring in his index finger, murmuring how credulous people may be.
Since that day, a series of unfortunate events ruined his life: he got divorced, lost his job, his parents died, was diagnosed with cancer, went bankrupt, his house fired...
Now, the ring lies at the bottom of the ocean.
The end.