The shadows in a church

I took this picture in an ancient church(the name escapes me, but if you asked, I could look it up for you.) in Barcelona that was full of shrines to more saints than I knew existed, along with many tombs directly below you dating back as far as 1629.

I took this picture of the shadow of something(I know it's not the Virgin Mary, because it's the shadow of a man.) on the altar and it just freaked me out. It wasn't the priest either. I don't know, as off the wall as it may seem, I got a weird vibe from that place, and I'm not a religious man at all.