A semi colon?

Here's the thing about semi colons... they don't make you look smarter because from what I've noticed, most people don't know when to use them.

Lesson:
Semi colons can only be used to combine two complete sentences that are related or with an adverbial conjunction paired with a comma.

Example 1:
The can ran quickly; it stumbled over my foot.

Example 2:
The cat ran quickly; however, it farted rainbows and was able to float over my foot.

I think there's one more use but who cares ?