Drive-Thru Edit: comma confusion

Proper use of commas will make your writing clear:

Example: Joe watched Estelle as she crossed the street and smiled.

In this sentence, Estelle is the one who smiled.

Example: Joe watched Estelle as she crossed the street, and smiled.

In this sentence, Joe is the one who smiled.

Example: I saw my father, the king, and George Clooney in the same afternoon.

In this sentence, the reader might think my father is the king. He is not, so:

I saw my father and the king and George Clooney in the same afternoon.

Write on.