That was once. One person that I know of. Then we got to know each other and I must have stopped seeming intimidating, since I'm sure we quite like each other.
It was a shock, though. I don't think of myself as intimidating, either physically or mentally. Mostly I seem not to intimidate people - or, if I do, I'm too intimidating ever to be told.
Tonight, I discovered that I've intimidated someone again. This time it's a fictional character. He's so scared that I'll find out what his motivations are that he's utterly refusing to talk. Not refusing to be present, but rather sitting silently vigilant, watching me as though I were the most dangerous creature in the world.
The wry thing is, I am. But not because of anything he could tell me. It's just that "world without end" is no longer an option.