Inthekeyofg, this trigger is pretty personal and I've rarely talked about it. But is something I did a long time ago that I realize I've never come to grips with. Sort of a mixed bag - I'm glad I figured out what it is, but it makes me uncomfortable. I've stuffed it long enough, time to face it, I think.
And to respond to some of the other posts, I have many of the garden-variety triggers too - music, watching sports, going into gas stations, etc.