WEEEE! I was bored one day and because of the new able to walk with the arrows thing, I found how to walk below the ground, which is fairly easy and similar to walking on walls.
Step One: Open your inventory!
Step Two: Click tab until yellow squares appear.
Step Three: Click tab until the yellow squares go away.
Step Four: Click enter, BUT WAIT!! Click tab 2 or 3 more times JUST in case!
Step Five: Use the arrows on your keyboard and click these steps:
1. Side until off screen 2. Down a about 5-8 times 3. Side about 1 or 2 times 4. Up 1-4 times.
Step Six: Go back to your inventory and exit.
Step Seven: Go up.
And done!! (:
-Nijineko24