My wife came running in the house last night about 10, I was in bed and she was taking the dogs out before she came to bed. She came in scared as hell, I'm not talking a little bit, really scared. We have about a 7'+ alligator in our pond, he lives right at our back fence in a drainage pipe, its about 20' from our fence which is just a gator fence, 3' high. Well he must have been bellowing, and loudly. She had no idea what it was. I got on the comp and showed her what one sounded like. So of course we sat out back on the patio to see if he would do it again, we waited about 15 mins to no avail. It must have been really loud because she thought it was in the back yard, it was funny her clinging to me as we went through the yard with a flashlight.