One of the biggest bucks I ever shot was after I spent the whole day hiking all over the mountain in Vermont behind the camp never even saw a deer started pouring and thundering out so I started heading back towards the camp and I was about a half a mile away on the edge of a powerline leaned my rifle against the tree was taking a leak and here comes an old Mossyback buck across the powerline coming straight at me.
I put the little gun away and picked up the big gun leaned against the tree and waited about two minutes and shot him walking by me about 15 feet away. Sheer luck 
Another time I stopped on an old logging road out in the woods I was looking at a big steaming pile of moose crap and about 30 feet away from me a big buck stood up out of a brush pile and looked me right in the eye and I plugged him to.
I call it luck but it's mostly about putting your time in the woods. And I do mean woods because there's not much open space up there solid forest . That's why I am a poor shot because I have never had to shoot very far. 
Great stories! Yep, you gotta be out there and if you are, good things happen sometimes. Put time in the woods and you see a lot of interesting things.
My buck this Fall I was bulling through noisy thick brush in pouring rain, not trying to be quiet, and the buck stood in the open waiting for me to come out. Who knows but my guess is that he waited to see what was making the noise coming through the brush. Stalking skill??? It was blundering luck, but I'll take it.
We've likely all got such stories. A friend and I on a spring bear hunt stopped on a spur road in the middle of a clear-cut to cook a big midday meal in bright sunshine. We had the skillet going when a large black bear strolled by on the main road 20 yards away. We were so disorganized we never got a shot off.