I most definitely believe in ghosts. My great great uncle had a heart attack in my grandparents barn, and whenever I told my friends about it I would always make it up to be some big supped up horror story so that I would freak them out. Well one night a couple of my friends spent the night with me and I was really trying to freak one of them out by taking them out there at midnight the "time that he died" (he died during the day). Once I was actually able to get her outside she wouldn't go near the barn, so I walked out closer to it to try to prove that nothing was wrong with it. When I looked up at the top of it where there you used to be a door thing but now its a big gaping hole, I saw a shadowy figure standing it it. I swear to God it felt like it was staring right through me. I freaked so badly that I didn't even realize what had happened until I was back inside. A little bit later my two friends talked me back into going outside with them. As I was passing by the barn I looked up at that spot and there was nothing there anymore.
Some people think that I imagined it, but I don't believe that I did.