Often times, a multiple may not have control over who has front, and needs triggers. Or, it happens at random. This is where rapid switching mainly occurs. For someone who loses time, this can be especially unsettling, to say the least. "Oh, I have front. But now I don't and Joe does now. But now he's right here with me and now Jessica has front!" This can be very confusing if you can't control it. For a multiple that remembers what each soul has seen, it can just be very confusing, and one may think "Who am I?"