I only seem to be able to achieve a solid breakthrough maybe every second or third time I smoke the stuff. More than anything else, I attribute this to the difficulty of really administering a large enough quantity of the drug before I'm too spaced out to successfully smoke any more. (You all know what I'm talking about - exhaling the second hit, watching your pipe turn into a hyperdimensional entity, desperately trying to locate the bowl so you can get that third hit, but failing - only to be tauntingly pulled toward the veil over hyperspace and pushed back again just before you really get a chance to see what's behind...
)
I don't know why I don't go ahead and order some caapi - I'm sure it'd be an immense help. Well, actually, I do know why - laziness and cheapness. It's no excuse however.
I did have a fairly exciting success with a combination of sniffed and smoked DMT crystal once. I had a clumsy moment when loading up my pipe, and spilled a good 50 milligrams or so onto my computer keyboard. I figured the only way to salvage it was to roll up a post-it and sniff the powder out from between the keys. After five minutes or so I was experiencing some mild closed-eye fractal imagery, and a general psychedelic headspace, meanwhile I'd been loading up another bowl in the pipe. When I judged I'd likely plateaued on the nasal dose I smoked the bowl, and while not the most earth-shattering breakthrough I've ever had, it was easily the longest and most visual. The "twin hyperspace goddesses" that I witnessed made for the only DMT visual that I can still recall clear as day today, and could likely render them with pen and paper if anyone asked me to (make no mistake however, I'm no artist
).