To me it always feels like the equivalent of drinking a poison chalice... Not that I haven't grown fond of that feeling through perserverance, but it can be very hard on unprepared first timers, even more so thatn the mental/visual aspects. This happens I think because they cling to that feeling of discomfort and uncontrolability and pull it with them into their experiences.
I used to also notice many more bodily effects when I started...
Time dilation of breathing, persisted for maybe the first 5 trips, in which it feels like breaths are happening literaly like minutes appart, it feels more physical than mental.
Also I got all the physical discomfort that would be associated with high anxiety, for a few seconds after tokeing, this would persist maybe 30 seconds, until there was nothing more to be done about it, than hand over control to the substance. This maybe lasted the first 30 times or so, and then started getting less accute.
There was also always the feeling of an impending kick or great electric shock that is going to hit my head, at about the same time as the effect just mentioned before starts to subside, I guess some people would say its that instance before they get slung out at hyperspeed... for me its always a feeling of falling backwards slowy in a gravitation free place... very awesome when the visuals match the sensation.
These all started disapearing when I started smokeing spice open eyed while interacting with people and nature, I tend to alternate between CEV and OEV sessions now. Its like I made piece with what happens with my normal physical self and what it goes through, during the open eyed sessions, alot of the discomfort (all of it?) was created by my ego, trying to cling on to the control panel.
I have great gratitude towards Phlux who turned me on to the magic molecule, what now feels like a lifetime ago.
So much has changed, while looking exactly like it used to on the surface.