Misplaced modifier, Dangling modifier, or correct as is?

I gave a pizza to my friend covered in hot cheese and pepperoni 

Misplaced modifier, Dangling modifier, or correct as is?

Waiting for the bus, time slowly dragged by.

Misplaced modifier, Dangling modifier, or correct as is?

Running down the field, a football hit him in the head.

Misplaced modifier, Dangling modifier, or correct as is?

The dog rolled around on the carpet covered in mud

Misplaced modifier, Dangling modifier, or correct as is?

The dog rolled around on the carpet covered in mud

Misplaced modifier, Dangling modifier, or correct as is?

As the teacher explained the instructions, I passed out the exam.

Misplaced modifier, Dangling modifier, or correct as is?

Greg recieved a box from the girl that was empty

Misplaced modifier, Dangling modifier, or correct as is?

Needing to leave quickly, the lunchbox was left at home.