Continuity mistake: At the start Gibbs has his coffee in his left hand. Camera cuts and it's now in his right hand. (00:02:25)
Continuity mistake: When Aaron Wright lights his cigarette in the NCIS elevator, he takes it out of his mouth to blow out a puff of smoke. His arm remains down by his side, but in the next shot his cigarette is instantly up in his mouth. (00:29:10)
Chosen answer: "Policing your brass", means to pick up your expended shell casings, after firing your rifle, or pistol.
pross79