system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do TV channels sometimes show just a second of a commercial, then go to another one? 

This is always irritates me. They'll show a second or two of a commercial, then go to another. Why is that, ELI5?
gpt
quite often if you notice the second commercial will be for something local (a lawyer, or some local store) this is because the local cable company is over-riding the commercial being broadcast by the TV station and they got their timing off.