Fun glitch I've discovered a long time ago when playing with the portal (was already there in the old version of Terminus).
The trick is to get yourself 'stuck' in the portal. You will keep floating and the only way out is to keep trying to back out or have someone help you. As soon as you do get out you will fly up like shown in the video. This effect will somehow stay active once it has happened resulting in flying up there everytime you try to jump in.
*Note,
Dying near or in the portal sometimes results in the player respawning inside the portal with no possibility of getting out. Quite an annoying bug which I hope gets fixed when the DLC launches.