I was outside putting siding on my parents house today when a multi-engine plane flew over at low altitude(Probably 250'). There isn't an airport for miles in any direction from here. I heard you aren't allowed to drop below a certain altitude near homes. When I was a kid, I can remember C-130's doing the same exact thing for training exercises flying out Morgantown West Virginia (MGW). Is there a low altitude limit outside of landing and taking off? If so, what is it.