[Cavernio]

No, I tend to not imagine a lot compared to the amount that other people tell me they do, period. I have imagined horrible things happening, but even then it's not about, say, when I'll be sharing news to someone. It will very occasionally be like 'what if they got hit by a car and died' sort of scenario, meaning it's completely unlikely to happen, it's nothing I know that will occur.
You know, I'm not even sure I've -ever- done what you said in regards to an event that I know is going to happen, like telling someone news, doing a job interview, etc.