I've detached before in order to face work in a room full of dead animals and blood. I figured that if I didn't, I would run away, and I would loose stability, which was something I decided to idolize at the time.
Being detached worked for about a month, but then suddenly I couldn't handle it anymore, someone got angry at me and a just went off into my head and brooded, going over every possible move I could make (and probably not using any Ti). I tried to keep my cool, I couldn't talk properly, for some reason I can't help but smile, possibly so that I don't betray what I'm feeling inside. I then locked myself in an empty room and everything I avoided through detachment hit me at once.
I'm still quite detached from it all, I can't tell how I feel about it. I just know that I've run away now, and I'm never going back... which I was trying to avoid in the first place, but I think I learned a lot from that anyway.
Just to clarify, I detach by living in the moment, silencing my inner self and just acting.