Seriously nothing, given the right environment. I've never been around DMT without already being up for days on meth, MDMA / acid / drunk etc. I would love to try it properly, not just a half-hearted toke, when totally straight and sober, not under the influence of other drugs, and properly slept, eaten well etc. All I've read suggests to properly break through is a truly spiritual experience, and I don't want to have demons on my back when I meet my god.
Yeah, try anything at least a few times. Having too much pslocybin and attempting to find myself by smoking pot really sent me to bad place a few days ago- but like I said, in a different environment around different people I would definitely try it again.
Also have never tried, and have no real intention of injecting anything intra-muscular. I've been told ketamine should be administered VERY CAREFULLY intravenously (if ever), but ideally should be IM, or insufflated.
The thought of an IM injection just seems kind of wrong.