I have a vivid memory of uttering those words when I was very young. The next thing I knew, my mother was rushing me to the bathroom in the nick of time. In retrospect, I'm amazed at how fast she got out of bed!
And, since I didn't mention it before, we also have a mattress protector on our bed (though I also slide 3x4 protector under the sheet when I diapered because it is easier to wash).