I didn't mean to offend anyone with my earlier comment. But I think it's important to bring up safety issues like this. Hearing a few good reasons to stay still and hearing a few horror stories can only help avoid common dangers.
Psychedelics are a mental trip, and combining it with a physical trip is almost always a bad idea.
When I was less experienced I wasn't nearly as careful. Usually it was mistakes like not having all right supplies beforehand. Now I take great pains to have everything right beforehand and an optimal "set and setting".
Simple, minor mistakes seem to most frequently cause problems. A simple trip to the store can quickly go very wrong. A quick run or walk through the woods can quickly get you lost. Any delays or trouble can easily ruin the trip for everyone when they worry about you or get paranoid.
You never know what can happen when tripping. I once took some wellbutrin as a "high enhancer" and ended up in a black and white trip that felt like a movie. Less than 2 blocks from a friend's house in the town I grew up in I was lost. I spent what felt like a solid 15 minutes trying to figure out where I was. I knew I SHOULD know where I was but had no idea which way to go. Any contact with LEO or a concerned citizen would have likely ended with me in the hospital or jail.
In any case, your best bet is to completely disconnect yourself from your body and explore your mind. Physical sensations and sights are interesting and amazing, but ultimately detract from your mental exploration. They keep you tied to and occupied with the normal, physical world.
Get all your supplies ready, all your friends around and settled, and lock the door. Stay inside until you're well on the comedown. Outside is great, but stay by the campfire or in the same field where you won't get lost or separated. If you want to move, WALK! Take in the sights and sensations. Running will give you a feeling of euphoria or exuberance, but you're wasting most of your mental energy in the moment trying to manage your body, not fall, avoid obstacles, etc.. Best case you're wasting your innerspace exploration time, worst case you get distracted, misjudge something, or have a plain old regular accident that can easily happen when running.
You can run, jump, and fool around anytime. Horseplay when you're tripping is just a bad idea. There's also plenty of time during the comedown for such things. When you're coming down and want to re-up the excitement a little, then take a walk or run. When you're back to 70-95% normality you can do whatever you want with a lot less risk. The important part is that if you DO get into trouble at least you know you'll be able to handle it and you'll also be straight before long.
When I trip with friends we get everything ready and lock the door. We set our watches on timer mode, and everything from then on is on trip time. If someone stops by we usually tell them to come back later. If someone wants to leave we talk them out of it. The outside world is outside and we're in a different place. The outside world is on "straight time" and doesn't understand us, so we don't deal with them.
Most of this shouldn't even apply to short psychedelics like DMT and salvia. Those are so short acting that you should never even think about doing anything other than savoring that brief experience.
If you can't be still for 15-30 minutes... Maybe you're just a little too wild or in the wrong mind state to be doing psychedelics at that specific time. You should always do a personal inventory before any trip and decide if it really is the optimal time for you to trip. A wise person will put irrational fear aside, but carefully note anything else that might make it a good idea to pick a better time.
I've made hyper friends go for a run to get it out of their system BEFOREHAND. It's certainly a good idea for anyone who likes to run. A good stretch and a little cardio is a REALLY good idea for everyone. It wakes you up, gets you feeling good, and gets your mind straight and active. The stretching helps you feel relaxed, reduces chances of cramps, and helps prevent restlessness. For me, it's an important part of the preparation routine.
Having a good preparation routine is key IMHO. Get everything done, prepare your body and mind a little, and let go of everything else first. Any good athlete can tell you that a routine is key. It focuses your mind and gets you to release any other worries. A pitcher or batter have their routines, normally they do the exact same thing every time. Even a little routine like this puts their mind in the right state and focuses them on one specific task.
Hopefully the advice here is helpful. Just a little logical reasoning, advice, and knowledge before hand can really help people to be safe IME. Hopefully you're now armed with solid reasoning about why you want to stay physically and mentally still so that you can get the most out of your experience and also remain maximally safe.
I see a few people posting about the confusing aspects of salvia. I experienced this my first salvia trip (pretty powerful), then had one or two more that were too weak to be very interesting. I cursed salvia as a worthless psychedelic that only produced useless stupor and confusion. However, I did eventually break through and have a couple wonderful trips.
I'm not sure if this is a physiological effect, purely psychological, or some sort of mind-learning. But if you had useless confusion and stupor, my advice is not to write salvia off as useless. Give it a few chances at various dosages. It's probably the only drug I've tried where my first impression was completely wrong. It's not my preferred substance by any means, but there is certainly some value there, even if you don't see it the first few times.
-FF
