There's a past experience that's been bugging me for almost 3 years, now. Basically, it happened as such: It happened when I was in 7th grade, during school in the morning. Class had just ended, and I was going towards the closest water fountain because my mouth felt dry. On my way, before I could even see the drinking fountain, a thought just suddenly popped into my head from nowhere: "It'd be kind of gross if a booger was on the spout..." I didn't really pay any attention when I drank from the fountain, but as I finished and lifted up my head, I spotted a yellowish clump of mucus right near the opening of the spout.
I felt a little sick after seeing that, so I just tried not to think about it the rest of the day. Well, after a year, I looked back to that experience and thought maybe I have some extrasensory ability or I was just REALLY unlucky. There have also been somewhat similar experiences in my past (totally random thoughts that turn into reality), but none of them are quite as memorable as seeing that nasty booger on the drinking fountain tap. I might be overanalyzing what is just a bad chance happening. The only person I've ever told this to is my mom, who thought the whole thing was just coincidence as well.