20 Modestly Inauspicious Omens

Inspired by / lifted from Hen Ogledd's "Trouble." 

1. A window cracks as you pass by.
2. An empty staircase creaks as though trod upon.
3. A single clap of thunder booms out of a fair sky.
4. An icy gust blows through your hair.
5. A flash of light blinds you for a moment.
6. The faintest whiff of ozone sets your nose twitching.
7. A little chunk of stone falls from above and barely misses you.
8. A cloud of fruit bats tumbles from their roost and swirls around you.
9. Your jaw clenches involuntarily, grinding your teeth painlessly but noisily.
10. A black cat crosses your path, stops, and yaks up a foul-smelling hairball.
11. You feel a sharp pain as though you've stepped on a nail, but there's nothing there.
12. A tiny puff of black smoke belches from the earth.
13. A toad croaks in an almost-human voice, but you can't quite make out the words.
14. You nearly slip on a broken string of red beads.
15. The light shifts for a moment and you see a doorway beneath a puddle's surface.
16. Every bell for miles around rings out at once, just once.
17. A pack of dogs that had been trailing you suddenly slink away, whining.
18. A constellation of green eyes shine at you from the dark, then vanish.
19. A drunkard singing tunelessly by the roadside names you in their song.
20. Curtains swing behind the closed windows of an abandoned house.