Crazy neighbors

Man i have some weird neighbors. This married couple prob in there 30s. The husband is this Army dude whos pretty friendly to me when i see him outside, however everynight round midnight he just goes off the handle on his wife. I mean he calls her everyname you could every think of. The guy sounds like hes gonna kill her, its outta control. Then the next day he always takes his freaking cat for a walk on a leash. Man people are weird. I think one of these days he will kill her and just walk off into the sunset with the cat