What is this animal or thing in my woods?

ok, so there is this crazy old man down the road from me that says he has seen big foot and it's kids in our woods...not believable at all. However...there is something freaky out there...ok, so sometimes there is this loud sound like a big tree is falling. I hear it here and there in our woods. Well, then the other day my sister (who happens to be 26) was walking out to her car and my mom was watching her to "make sure nothing gets her." Well, she stopped in her tracks and mom asks what is wrong. She said that there was something in the woods that looks as big as a horse. She said it doesn't look like anything she's ever seen, but it was too dark to really make it out 100%. Well, I was just outside smoking a cigarette and I heard this sound a few feet into the woods that was extremely loud and it sounded like a duck call or like when you press your tongue against your teeth and push air out of the back of one side...it did the sound twice and I ran inside lit cigarette in hand and closed and locked the door. Knees shaking and barely able to stand I ran upstairs and told my mom about it and she told me about my sister's story of seeing a big animal in the woods. And no...it wasn't a duck. A duck quacks, but a duck call does this loud scratchy noise. It was a noise identical to the sound your mouth makes like I said earlier. Now, I have no clue what it was, but I'm not smoking outside in the dark ever again!!! LOL! But IDK...we have had our neighbors house burglarized before and a couple times burglars were in our neighborhood, so I don't know if it was a person or an animal or what...but why would a person be hiding in my woods making sounds to scare me? LOL! I sound crazy, but I have got to know what this is. Anyone have any idea?