Many years ago, before you had to kill a deer out of a tree. I had a neighbor who, was, trying out the new fangled elevated tree platform setup. (2x4's plywood and nails) A buck walked in and he missed it. A while later it came back and kept looking up at him. Odd at the time because deer "absolutely did not look up". He was able to get another shot off and another miss I might add. Couldn't figure it out the weird behaviour of the deer, not his shooting, until he came down off his perch and noticed his flashlight that was in his back pocket had been turned on. Yes deer can be curious.
Crash87