I am an Air Force vet and wound up walking across campus with this Marine Corps vet as our classes were in the same direction. When I asked him what he was studying to be, he got this really wicked looking smile and said he was going to be a cop. Kinda like he could taste the power already. He was a big bastard too, about 6'5" and around 300 pounds.
My Grandpa was retired Seattle PD, and he used to call some of the guys he worked with "the thumpers".