That sounds odd that you didn't experience anything, but generally holding for that long won't benefit you at all. Just give it 10-15 real seconds imo (for future smoking). Holding a hit of DMT for much longer than that would pretty much ruin the chance of blasting off
Oh, I'm very sorry for the confusion. I did not mean I experienced "Nothing," I meant I didn't break through by doing that. I would take a hit, hold in for 15-20 seconds, while reloading with fresh new salvia, exhale while lighting the bowl again with my torch lighter and inhale another lungful without a breath of fresh air.
Doing this 3 times with 20x would get me no CEV, but I'd have STRONG OEV and I'd see faces everywhere in everything. I'd feel Salvia gravity, and it would be so odd. Everywhere I look, objects morphed into faces:
If I looked into a winamp visualizer, no matter HOW ABSTRACT (this would always amaze me), I'd see humanoid figures in it. Faces or colored bodies (red, green, blue, anything).
Why is this? I don't know.
I only break through when I have DXM with me. At that point, the visuals change. I can see something like Super Mario Bros playing out in my bedroom and if I close my eyes, I might have ego loss and start flying around psychedelic landscapes.