MISPLACED AND DANGLING MODIFIERS

Rule 1. If you start a sentence with an action, place the actor immediately after.

Incorrect While walking across the street, the bus hit her.

Correct While walking across the street, she was hit by a bus. OR
She was hit by a bus while walking across the street.

Rule 2. Place modifiers near the words they modify.

Incorrect I have some pound cake Mollie baked in my lunch bag.

Correct In my lunch bag, I have some pound cake that Mollie baked.