Hey! Sorry I'm late to the thread. You guys didn't invite me

Here's how this shit works.
Yes. You can move around on DMT. Yes you can do it on high doses. How do I know this? Because I can dance, walk, spin, run, etc on ~70mg. It's not an if, it's already been done. I'll make a video if you want me to.
This is how I came about the skill of it. If you want to learn to walk around on DMT, try an ayahuasca analogue. Dose an MAOI, wait 30min, dose your dose. While it soaks in, I lie down on my bed with my feet hanging off the edge of the bed on the ground. Do some vipassana and meditate downward into your body. You may feel nauseous depending on the quality of brew you made, DO NOT WORRY about it. There are only two possibilities. You will throw up or you won't. Obvious, but true. If you will throw up, there will be a threshold point reached in the saturation of the chemicals and your body will make it 100% clear that it is the time to purge. If you are still thinking about whether to purge. Stop. Your body will decide for you, but keep it down as long as possible. When it is finally time to purge, you will get up and go purge, either into a receptacle on the floor or in a nearby bathroom. After the necessity of throwing up is over... TADA! You have walked under the influence of DMT, walk around for a bit to get used to it. Then once you have the hang of it, go smoke some more DMT and go for a walk in the universe.
On the matter of looking at yourself in the mirror:
I have two theories about what the nature of this experience is. Neither are proven, but just from personal experience. I believe the actual truth is a hybrid between the two.
1 - When you look at a mirror on a psychedelic it sheds the mental filter you have developed for yourself over time. You look, usually unprepared, at a fresh impression of yourself devoid of any illusions you created. Like seeing a bad photograph of yourself. It will show you all the aspects about yourself you brain normally hides from yourself if it does so. Some people already have an illusion free perception of themselves and as such would not experience this part of the mirror staring experience. Others who significantly delude themselves will be faced with an alien person who appears as a horrible caricature of themselves. Your true self is a balance between the two sides. The side of the spiritless material, and the side of the person your creative consciousness generates.
2 - Modern science hypothesizes that there are infinite multiple universes. It might be possible that when staring into a mirror on psychedelics that your expanded consciousness is able to see in the mirrors reflection the reflection of the section of other universes in which you also happen to be in your bathroom staring at a mirror at that exact moment and moving in the exact pattern. The morphing is your shifting perspective sliding between the perceived other you's, that much is true at least. Whether they actually exist or not is speculation. This could also account for Theory 1 as someone who lacks understanding of Theory 2 might experience it and it could create a fearful response to seeing a different you, when expecting to see yourself, which the psychedelics would then amplify and strengthen leading to such horrible stories that have been stereotyped into staring at mirrors.
The key to handling fear and psychedelics is actually relatively simple. First start with an objective assessment of what fear is. Fear is a biological reaction to perceived danger. This takes place as a flood of bodily chemicals. Those chemicals then mix with the consciousness on psychedelics which amplifies them and can create a feedback loop of fear, terror, and amplification.
If one instead heads the reaction of at the beginning, that is entirely averted. Educate yourself on your substance, your setting, and your safety. When you know that at the end of the experience you will survive, then realize that any fear is an instinctive reaction and is not beneficial to the experience of expanded consciousness. Just because the body doesn't know what is going on doesn't mean your mind can't. Stay centered in your knowledge of safety, and reassure your body that things are okay by giving it a light massage while consciously relaxing and controlling your breathing. When practiced, this process will help to eliminate everything from mild anxiety to, hopefully, intense fear. I cannot vouch for intense fear though, because the method has been so personally successful that after my first, and only, bad trip where the mantra "Don't worry, you are on drugs, this was supposed to happen," provided excellent guidance. Now I do not EVER get anywhere near bad trips as I can easily control my body, mind, and its responses to the administration of a new substance. (My first time ever on LSD I just jumped for 5 hits, it was easymode. I'll be doing far more next time lol, I want it to last longer.)
Remember that when you try a new substance, just like you must adjust mentally as the experience comes on, you must adjust physically. What you feel is your bodies reaction to a new foreign chemical. Be confident and accept the feeling(and the chemical) and you will find that anxiety and fear are nothing more than a creation of your body and instinctive consciousness. Now that you see that, let yourself expand and keep going. Good hunting.