DMT is one of the most hallucinogetic substances in the world, equivilant to salvia divinorum, ive never met anyone who has tried DMT, but theres a chemical in ur brain with almost the exact same chemical compound as DMT. it gets released when ur about to die, and also when ur dreaming. 2ci is some crazy shit, it hasnt even been properly tested on human subjects, but i have had friends that tried it, and they said it was awesome, great visuals from what i understand. But like i said, its untested and COULD present some medical problems later, but that is unknown.