Real danger? Yes. But I am aware of one modern initiation rite where, at one point, the candidate is meant to experience real physical fear. And the method used to induce that reaction would probably raise a few eyebrows too.
Fear. What state are we in when we are in fear ?
I remember a visit here from a senior Lama. I was already used to Lamas and knew what to possibly suspect (many- well, 'new age. / 'spiritual' people have strange ideas about them - I have had a meat BBQ with them and then one took me to the shop in their new car, burnouts and do-nuts on the road to start the journey, yes, in full monks robes
)
Anyway, Lama goes; "What is this meeting space for ? " and a woman answers " It is for meditating ."
"Oh ... people here do meditating ? I do meditating, lets 'meditate' together ." (yes, I noticed an inflection there ).
So every one sits in some version of lotus, goes all peaceful and serene ... what a load of BS ! I hate this stuff * ! So I dont do it. But Lama opens his eyes and sees me being 'unmeditative'. He mimes to me with his face ; close eyes ! So I do. ... but still ....
Then I heard his breathing change so I opened my eyes and saw he was drawing in a giant big breath .... so I was ready for it ... and he , at the top of his lungs ..
" PEH ! "
Half the room jumped out of their skin !
Lama , " Yes, thats it ! Now you have it ... no no ... dont loose it ! Ohh, you are loosing it ... hold it., hold it, ohhh ... you lost it. "
" For a moment there some of you came close to awareness ".
- and eventually, with increased awareness, fear can be overcome by awareness (if it is a problem for you ... or, more correctly ; the super aware state fear can put one in can be invoked without the fear itself )
" I learned that you can actually decide what to think about. I had a choice! Eureka! I decide what meaning to give to any thought that surfaces, at any given time. Wow! "
http://movingbeyondfear.com/mind-tornadoes-using-awareness-to-overcome-fear/
... and " To obtain Magical Power, learn to control thought; admit only those ideas that are in harmony with the end desired, and not every stray and contradictory Idea that presents itself.
"Fixed thought is a means to an end. Therefore pay attention to the power of silent thought and meditation. The material act is but the outward expression of thy thought, and therefore hath it been said that “the thought of foolishness is sin.” Thought is the commencement of action, and if a chance thought can produce much effect, what cannot fixed thought do?"
http://hermetic.com/crowley/libers/lib30.html