I'm wondering about "out of the" versus "out the".
Example: He walked out of the door. He walked out the door.
Example: He gazed out of the car window. He gazed out the car window.
Example: He parachuted out of the cloudy sky. He parachuted out the cloudy sky.
Are they interchangeable? If one or the other is incorrect, can someone explain why?
I think you need "of " to connect " He walked out " to " the door " in that it shows " by what means " or " by way of ".