This might sound totally lame, and I'm kinda ashamed to even post about it, but since we're on the subject...back in middle school, I bought a "spells and charms" book (still have it somewhere in my hoards of books) so my friends and I gathered, idoliIng the movie "The Craft", without any real knowledge or respect of it all...Anyways, I preformed a charm on this guy I had a crush on...He never liked me back that I knew of, but he ended up being killed in a car crash in high school...In retrospect, I don't think the "charm" had anything to do with it, but the thought crossed my mind...like it had backfired somehow...
Some theorize that they can backfire. Don't be ashamed. I was into candle magick when I was in high school.