Somewhere recently someone had a quick way to boot down to single user level. If I find it I edit this.
Edit: I found this solution to shutdown to single user:
From a command line, you can use the init command to go immediately into runlevel 1, which is also known as single user text mode. Open terminal and type the following command:
sudo init 1
Again get back to GUI with init 2 command:
sudo init 2
When you type init 1 command your session will then begin to shut down and bring you into single user text mode. When you type init 2 command your session will then begin to shut down and bring you into GUI mode