My brother-in-law told me this story, and I laugh at him about it (I laugh at him a lot, but that's another story). He had climbed up a tree and sat in his stand. Roughly 15 minutes later he hears a rustling in the tree above him, and bark starts hitting him in the head. He looks up to see a raccoon climbing down the tree toward him. Needless to say, he didn't wait to see what the raccoon was going to do, and at the same time, cleared the woods of any deer that might have been there.
Another time, my brother-in-law and I were heading out into the woods behind my parents' house to squirrel hunt. I had my dad's old single shot 20ga, and I believe my BIL had my dad's single shot .22. In the woods is a clearing where a neighbor had built a tree mansion that has since collapsed. As we get halfway across the clearing, we both see a squirrel jump onto a tree and start climbing up. My BIL says "squirrel" as I'm simultaneously shouldering and cocking the 20ga, and without even thinking, I pull the trigger, only to hit the squirrel, and launch it roughly 5' back from the tree. I'm still amazed at that shot.
2 years ago, I was behind my parents' house bow hunting. I'm not seeing much within shot distance until out of nowhere, a 5-point pops out of the brush, 15 yds away. I get set, site in between two trees, waiting for it to step through. I release the arrow, and it flies directly over its back. CRAP. It takes off, and I don't see anything the rest of the morning. As I get ready to climb out of the tree, a squirrel pops up and starts rummaging around below my stand. I put my broadhead away and knock a field tip. I draw back, aim, and hit that squirrel right square in the brisket. It lets out a shriek and starts to climb the tree next to be, with my arrow sticking out of it! I'm sitting there thinking to myself, #1, I can't hit a deer, but I can hit a squirrel, and #2, the dang squirrel's going to steal my arrow! As the squirrel heads up the tree, the arrow pops out and clanks to the ground. I still shake my head at that one...
I've only been hunting for a handful of years, so that's all the stories I've got.