If you set many chairs in a row, you can teleport from chair to chair allowing for a very fast and unbalanced mode of transportation. Also, while teleporting between chairs, you can sometimes see through the world and spot caves.

Here is a video demonstrating this:
https://youtu.be/_vvbx-uUKP0

At about one second (press 1 on your keyboard) you can clearly see the x-ray in action.

Fixed in version 1.1.1. Players can no longer move between chairs without dismounting.