I can't really recall personnally seeing anything that was unexplainable, but I have heard noises that I didn't know what were. I've heard limbs break that seemed to be too big to have been broken by the game in my area and I've also heard some calls (for lack of better terms) that were definitely made by animals (don't really know what). The one thing I'd like to point out is, I haven't quit hunting because of them. I am still in the stand before daylight until after dark.