What is a example of a comma splice being corrected by subordination?

A comma splice occurs when two independent clauses are separated by a comma. This is incorrect punctuation.

Example: Someone is at the door, I need to get dressed and go downstairs.

One way to correct a comma splice is by subordination--that is, by using a subordinating conjunction.

Example: Because someone is at the door, I need to get dressed and go downstairs.