Wow... No bs, I was hunting south of Tucson last Sat the 1st and we heard "thunder" but it was different. It was combined with a sonic boom kind of sound. My uncle and I looked at each other a little puzzled but said nothing. Hes not the kinda guy to chat with about anything abnormal so i left it alone. when i came home i told my wife but forgot about it till now. It was definitely a strange sound!