You left out ESC.
That is where people get confused.
The number one thing that people need to learn about vi and vim (these days), is that you are either in command mode or edit mode.
They need to learn that if they get confused to use the ESC key to get back to command mode.
Then they can try :q! or :wq!
Power off can confuse them even more if they run into the recovery file.
When learning vim, make sure you understand the purpose of ESC.