Don't throw it away, handle it with respect - not fear. Just avoid taking it for fun, without any preparation or devotion... some people may learn to use DMT recreationally but for me personally it would not work. Because I have tried using it somewhat casually, like it sounds the guy in the OP did and I got my ass handed to me. I experienced thought patterns and things that happened to me moments ago, but the events I saw before my eyes were twined and braided into a loop making me think I was hopelessly insane.
However when I consider it like the deeply spiritual sacrement it is, take the time (30-60 minutes or so) to meditate and to take a hard and honest look at the concurrent thoughts and feelings I am living with - if I do all that preparation before taking it, I can maintain peace while feeling like a rocket is launched. The point is not that I have experience with this psychedelics and others, but that the preparation as an extension of your set and setting can make a world of difference. And that setting up a frame of reference for what you are doing can make it much more possible to integrate the experience. Yes it is still insanely out of this world, and there are limitations to how you can prepare for it just like knowing something does not make you realize it in your heart... but I truly believe that the experience is as open and honest to you as you are to yourself when you take it.