Do U believe in demons,aliens,ghost....??

about a month ago i was walkin through a trail to get to my house....it was like 10:00pm and im like really freaked of the dark!! and when i was half way through i sware on my life!!, i saw what looked like a floating seethru person!! i blinked a couple times to get it out of my sight, thinkin it wasnt real and it would go away, but as i walked closer it became more visible. i stopped and stared for a second and it turned around then turned back at me and vanished!! i didnt know what to do!! i wasnt gunna go back the other way so i just booted it to the end of the path and was home in like a min. None of my friends believe me really, i just wanna know, do any of u guys believe in that stuff..is there something that would make me hilusinate? have u experienced anything like this?? thanks