trust me. there's not enough time to get a lonesome feeling....maybe a 'what the fuck happened to the room i was just sitting in' feeling.
I've done it once and didn't really like it. it's such an intense drug that I hate doing it around people but when i'm alone it's horrible. I've done DMT twice and my verdict is that DMT isn't a drug that I should take at this point in my life. There's some drugs that I think should be taken under special circumstances. I belive it's a reward, or good for spiritual development or whatever, and to be honest I don't believe I've quite earned the right to take it.
IMO, alone is the best way to take DMT. I get really anxious that somebody will freak out when I start doing weird shit on the peak. Just make sure to tie the pipe to the ceiling so that you don't break it. I can't imagine waking up from DMT to hot glass all over you would be very fun.
i usually do it by myself. your fine as long as you dont fall backwards and crack you head on something.