system
Given the following post, respond as if you're commenting on Reddit:
human
What causes something that has been balancing for a prolonged amount of time to fall over, without anything touching it?
gpt
Suggestions, more or less in decreasing order of probability:

- Wind/air currents
- Thermal effects on object or surface (expansion/contraction of something thermally causing slight changes over time in size, ultimately changing the geometry enough to move from stable to unstable)
- Effects of extremely minor gravitational pulls (tidal effects from moon).