If you are over-encumbered to the point where you can't move while walking but can while sprinting, and engage a sprint but let go a second later while still holding a movement key your character while start floating in that direction (leaving behind lighting and displayed names) letting you see things in front of you with kind of a wall hack (you can see past trees). This stops if you hit into something solid, snapping you back (to reality), or if you let go of the movement, but will show you that location normally.

I'm unsure how this is seen by other players, but I assume they would only see you at your original position, and maybe at the second location (where you get lighting back).

Not shown in GIF:

You can also interact with burrows (assumedly other things too) letting you travel possibly invisibly and definitely avoiding all stamina cost while over-encumbered.

Also can freeze the game if you are the very edge of the map and do this into the edge to go to the next area.

Also had to cut the GIF short so you don't see the part where I stop and can look around like I'm at the far away spot (with normal lighting and being able to read a burrow name).

• Encumber yourself to were you can't walk but can run.
• Hold movement key.
• Hold sprint for a brief moment (let go before you fully go into a new tile)
• Keep holding movement key and witness astral projection.
• Extra: let go of moment key before hitting wall/tree/solid/etc and have the game act like you are there.
• Try to move around (using sprint) again to snap back to original spot.

EDIT: I just realized the GIF down below was cut off more than I thought, it is too late/early to deal with this though, you can at least see the start of the glitch, you can also follow the instructions.

Here is a GIF of me doing it I made a imgur account to post this gif.