Yeah, i've seen some people pretty used to trips get that expression on their face which you can just tell means they know they're about to go over the edge of the rollercoaster, and something serious is building up. One girl I know did 20-25mg of 2c-e at a festival recently, i've not heard back from her, I reckon she was probably ok once she came up, but I can imagine it was more intense than she was expecting!
I have found 2cb to be quite easy in some ways, but also a bit... hmm, well it is still definitely a psychedelic drug, and not all fun and games, i've never got near to freaking but on 10-15mg trips or so, it can still be quite... confronting. Plus oral use means the body load issues and rumbly-tummy n tension are another factor (for me anyway).
Was tempted to try 2c-i last night at a psy night, a fairly low dose, but I decided against. Could have been fine, but I think i'll try it outside on a beautiful day first and work from there. Tryin to respect 2c-* drugs cos I know people who have had their arses well and truly kicked by them hah..
btw those yellow butterflies are 15mg of 2c-b supposedly, and very "pure" stuff I have heard. £10 a pop though usually, and considering I was offered 30mg of powder for that, why bother?