9. Stop a runaway horse
May not be useful for city-dwellers (unless carriage rides are still a thing in your city) but could be helpful for those residing in areas with farms.
10. DIY bird fountain
11. Light a match in the wind
Assuming you’re using a match and not a lighter.
12. Stop yourself from knocking over vases
This is a good life hack because it can give you other ideas of heavy things to put in your vases, should sand not be readily available.