I have yet to use my safe word during play. Although there is one time that stands out in my mind when I should have. Honestly though, I never thought of it. I trusted Master so much that it never crossed my mind to use it, even with the amount of pain I was experiencing. This was many, many years ago... chaulk it up to lack of experience I guess. Needless to say we had a VERY long discussion, after the fact, as to why I didn't and when I should.