Memory told of a possible encounter while deer hunting east of Manistee witnessed in Manistee County, Michigan

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I was deer hunting in a swamp, back end of the Clay Bank Swamp. I was by myself and in my favorite spot that I had picked out when I was about 14, I usually go in before daybreak and don't come out until dark, pack a lunch with me. The day was normal, several does, no bucks. About a half hour before dark I heard a loud scream just off to the north of me, I had never heard a sound like that before in the woods, a minute later a branch was broke off a tree in the same direction, it was not a small branch as it cracked loudly. At first I just watched closely in that direction wondering what the heck was that? And then caution set in, as like I said I had never heard anything like that, I hunt with a Krag 30-40, so I took the safety off and wrapped my thumb around the bolt to prevent accidental discharge and then I was going to wait for dark, but again caution told me to get out of the swamp, then butterflies set into my stomach because of the unknown and I had the urge to run, but I refus...