I didn't see anything. But it sounded like a freight train took off running through the trees. Didn't sound like anything I've ever heard in the area. We get small black bear, but they don't run on two feet. And there was a horrible smell, like just the worst musk / shit you've ever smelled.
I got up in my tree stand and sat there and I felt like I was having holes drilled in me from someone staring at me, but I couldn't figure out from where. It finally got in my head enough that I just had to leave.
Never really felt comfortable in my tree stand after that. I tried a ground blind a few times, but one time I was in there and had a doe sneak right up behind me, and I didn't have the rear flaps open on the blind. I made some small little noise, and she heard me and she started blowing and snorting. I about came up out of my skin it scared me so much.