My tale is short and sweet. My family and and I were hiking on a well-traveled trail in Mohican State Park in Ohio (known for bigfoot sitings, by the way). Well, I wasn't thinking about bigfoots at all, but I have read about tree knocks, howls, and such. Anyway, we came to one of those short bridges that the parks put over creeks, about 10 feet long, and in my very best Gandolf impression, I brought down my walking stick while stating loudly, "YOU SHALL NOT PASS!" BOOM. BOOM. I hadn't done it twice, but there was a very loud wood-banging-wood sound just over the top of the little ridge to our right, and totally sounding like it was in answer to my stunt.
Yes, I did go up and take a look. I was looking for the smell they say these things make, or footprints. But, alas, nothing. Just a nice loud curious memory.