Possible rocks thrown and wood knocks 30mi ESE of Tulsa, off Rt. 51 witnessed in Tulsa County, Oklahoma

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This is the third encounter I believe I have had at this same location. I was out fishing in my kayak and I was about to turn back to go to my truck. I was coasting enjoying the evening then there was a large splash about 15 feet toward the shore beside me. I had one headphone in on the same side so I couldn't hear well but I did not hear any movement. There is no way this could have been a fish because the pond does not have any fish large enough. I believe it was a rock because it did not float back to the top. It had been raining a lot that week so it would have taken almost a monster truck to get to that side of the pond. I have had a similar incident at the same location hearing what sounds like wood knocks at night and I have had another incident where a rock was thrown into the pond while I was on it as well. It is very tough to get to that area so I firmly believe that it couldn't have been anything else. I have also had an incident where I was further back in the woods and hea...